A bird is an animal with wings, feathers, and two legs. Birds, from chickens to crows, are also warm-blooded and lay eggs.

Most birds can fly using their wings, and when you visit the coast you'll see various sea birds like gulls, terns, and cormorants. You can use the word bird as a verb meaning "to observe birds as a hobby," and in some places, particularly Britain, it's also a noun meaning "young woman." Bird is an Old English word, an unusual form of bridd, "young bird or fledgling," from an unknown origin.

Definitions of bird
  1. noun
    warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
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    dickey-bird, dickeybird, dicky-bird, dickybird
    small bird; adults talking to children sometimes use these words to refer to small birds
    adult male bird
    adult female bird
    a bird that has built (or is building) a nest
    night bird
    any bird associated with night: owl; nightingale; nighthawk; etc
    bird of passage
    any bird that migrates seasonally
    most primitive avian type known; extinct bird of the Triassic having bird-like jaw and hollow limbs and breastbone with dinosaur-like tail and hind limbs
    Archaeopteryx lithographica, archaeopteryx, archeopteryx
    extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds
    sparrow-sized fossil bird of the Jurassic period to the Cretaceous period having a keeled breastbone and vestigial tail; found in China; considered possibly the second most primitive of all birds
    sparrow-sized fossil bird of the Cretaceous period having a vestigial tail; found in Spain; considered possibly the third most primitive of all birds
    extinct primitive toothed bird with a long feathered tail and three free clawed digits on each wing
    flightless bird, ratite, ratite bird
    flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
    carinate, carinate bird, flying bird
    birds having keeled breastbones for attachment of flight muscles
    passeriform bird, passerine
    perching birds mostly small and living near the ground with feet having 4 toes arranged to allow for gripping the perch; most are songbirds; hatchlings are helpless
    nonpasserine bird
    chiefly arboreal birds especially of the order Coraciiformes
    bird of prey, raptor, raptorial bird
    any of numerous carnivorous birds that hunt and kill other animals
    gallinacean, gallinaceous bird
    heavy-bodied largely ground-feeding domestic or game birds
    usually brightly colored zygodactyl tropical birds with short hooked beaks and the ability to mimic sounds
    cuculiform bird
    birds having zygodactyl feet (except for the touracos)
    coraciiform bird
    chiefly short-legged arboreal nonpasserine birds that nest in holes
    apodiform bird
    nonpasserine bird having long wings and weak feet; spends much of its time in flight
    caprimulgiform bird
    long-winged nonpasserine birds
    piciform bird
    any of numerous nonpasserine insectivorous climbing birds usually having strong bills for boring wood
    forest bird of warm regions of the New World having brilliant lustrous plumage and long tails
    aquatic bird
    wading and swimming and diving birds of either fresh or salt water
    a bird that twitters
    fighting cock, gamecock
    a cock bred and trained for fighting
    night raven
    any bird that cries at night
    Struthio camelus, ostrich
    fast-running African flightless bird with two-toed feet; largest living bird
    large black flightless bird of Australia and New Guinea having a horny head crest
    Dromaius novaehollandiae, Emu novaehollandiae, emu
    large Australian flightless bird similar to the ostrich but smaller
    apteryx, kiwi
    nocturnal flightless bird of New Zealand having a long neck and stout legs; only surviving representative of the order Apterygiformes
    Rhea americana, rhea
    larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia
    Pterocnemia pennata, nandu, rhea
    smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan
    aepyornis, elephant bird
    huge (to 9 ft.) extinct flightless bird of Madagascar
    extinct flightless bird of New Zealand
    oscine, oscine bird
    passerine bird having specialized vocal apparatus
    sparrow, true sparrow
    any of several small dull-colored singing birds feeding on seeds or insects
    Australian bird that resembles a pheasant; the courting male displays long tail feathers in a lyre shape
    scrub bird, scrub-bird, scrubbird
    small fast-running Australian bird resembling a wren and frequenting brush or scrub
    small birds of the Old World tropics having bright plumage and short wide bills
    a passerine bird of the suborder Tyranni
    jenny wren, wren
    any of several small active brown birds of the northern hemisphere with short upright tails; they feed on insects
    Accipitriformes, order Accipitriformes
    in some classifications an alternative name for the Falconiformes
    diurnal bird of prey typically having short rounded wings and a long tail
    bird of Jove, eagle
    any of various large keen-sighted diurnal birds of prey noted for their broad wings and strong soaring flight
    any of various large diurnal birds of prey having naked heads and weak claws and feeding chiefly on carrion
    Sagittarius serpentarius, secretary bird
    large long-legged African bird of prey that feeds on reptiles
    bird of Minerva, bird of night, hooter, owl
    nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes
    domestic fowl, fowl, poultry
    a domesticated gallinaceous bird thought to be descended from the red jungle fowl
    gallina, jungle fowl
    small Asiatic wild bird; believed to be ancestral to domestic fowl
    Agriocharis ocellata, ocellated turkey
    wild turkey of Central America and northern South America
    any of several large turkey-like game birds of the family Cracidae; native to jungles of tropical America; resembling the curassows and valued as food
    large crested arboreal game bird of warm parts of the Americas having long legs and tails; highly esteemed as game and food
    slender arboreal guan resembling a wild turkey; native to Central America and Mexico; highly regarded as game birds
    megapode, mound bird, mound builder, mound-bird, scrub fowl
    large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs
    Opisthocomus hoazin, hoactzin, hoatzin, stinkbird
    crested ill-smelling South American bird whose young have claws on the first and second digits of the wings
    columbiform bird
    a cosmopolitan order of land birds having small heads and short legs with four unwebbed toes
    an archaic term for a parrot
    poll, poll parrot
    a tame parrot
    African gray, African grey, Psittacus erithacus
    commonly domesticated grey parrot with red-and-black tail and white face; native to equatorial Africa
    mainly green tropical American parrots
    long-tailed brilliantly colored parrot of Central America and South America; among the largest and showiest of parrots
    Nestor notabilis, kea
    large brownish-green New Zealand parrot
    white or light-colored crested parrot of the Australian region; often kept as cage birds
    Nymphicus hollandicus, cockateel, cockatiel, cockatoo parrot
    small grey Australian parrot with a yellow crested head
    small African parrot noted for showing affection for their mates
    small brightly colored Australasian parrots having a brush-tipped tongue for feeding on nectar and soft fruits
    parakeet, paraquet, paroquet, parrakeet, parroket, parroquet
    any of numerous small slender long-tailed parrots
    any of numerous European and North American birds having pointed wings and a long tail
    touraco, turaco, turacou, turakoo
    large brightly crested bird of Africa
    Old World bird that tumbles or rolls in flight; related to kingfishers
    nonpasserine large-headed bird with a short tail and long sharp bill; usually crested and bright-colored; feed mostly on fish
    bee eater
    colorful chiefly tropical Old World bird having a strong graceful flight; feeds on especially bees
    bird of tropical Africa and Asia having a very large bill surmounted by a bony protuberance; related to kingfishers
    hoopoe, hoopoo
    any of several crested Old World birds with a slender downward-curved bill
    wood hoopoe
    tropical African bird having metallic blackish plumage but no crest
    momot, motmot
    tropical American bird resembling a blue jay and having greenish and bluish plumage
    tiny insectivorous West Indian bird having red-and-green plumage and a long straight bill
    a small bird that resembles a swallow and is noted for its rapid flight
    crested swift, tree swift
    birds of southeast Asia and East Indies differing from true swifts in having upright crests and nesting in trees
    tiny American bird having brilliant iridescent plumage and long slender bills; wings are specialized for vibrating flight
    caprimulgid, goatsucker, nightjar
    mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects
    insectivorous bird of Australia and southeastern Asia having a wide frog-like mouth
    Steatornis caripensis, guacharo, oilbird
    nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter
    pecker, peckerwood, woodpecker
    bird with strong claws and a stiff tail adapted for climbing and a hard chisel-like bill for boring into wood for insects
    small brightly colored stout-billed tropical bird having short weak wings
    brownish tropical American bird having a large head with fluffed out feathers
    honey guide
    small bird of tropical Africa and Asia; feeds on beeswax and honey and larvae
    tropical American insectivorous bird having a long sharp bill and iridescent green or bronze plumage
    brilliantly colored arboreal fruit-eating bird of tropical America having a very large thin-walled beak
    quetzal, quetzal bird
    large trogon of Central America and South America having golden-green and scarlet plumage
    water bird, waterbird, waterfowl
    freshwater aquatic bird
    stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult
    wader, wading bird
    any of many long-legged birds that wade in water in search of food
    gallinule, marsh hen, swamphen, water hen
    any of various small aquatic birds of the genus Gallinula distinguished from rails by a frontal shield and a resemblance to domestic hens
    sea bird, seabird, seafowl
    a bird that frequents coastal waters and the open ocean: gulls; pelicans; gannets; cormorants; albatrosses; petrels; etc.
    game bird
    any bird (as grouse or pheasant) that is hunted for sport
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    craniate, vertebrate
    animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
  2. noun
    the flesh of a bird or fowl (wild or domestic) used as food
    synonyms: fowl
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    flesh of chickens or turkeys or ducks or geese raised for food
    flesh of any of a number of wild game birds suitable for food
    chicken, poulet, volaille
    the flesh of a chicken used for food
    Rock Cornish hen
    flesh of a small fowl bred for roasting
    guinea hen
    flesh of a guinea fowl (especially of hens)
    dove, squab
    flesh of a pigeon suitable for roasting or braising; flesh of a dove (young squab) may be broiled
    flesh of a duck (domestic or wild)
    flesh of a goose (domestic or wild)
    flesh of any of various grouse of the family Tetraonidae; usually roasted; flesh too dry to broil
    flesh of quail; suitable for roasting or broiling if young; otherwise must be braised
    flesh of either quail or grouse
    flesh of a pheasant; usually braised
    flesh of large domesticated fowl usually roasted
    type of:
    the flesh of animals (including fishes and birds and snails) used as food
  3. verb
    watch and study birds in their natural habitat
    synonyms: birdwatch
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    type of:
    watch attentively
  4. noun
    badminton equipment consisting of a ball of cork or rubber with a crown of feathers
    synonyms: birdie, shuttle, shuttlecock
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    type of:
    badminton equipment
    equipment for playing the game of badminton
  5. noun
    a cry or noise made to express displeasure or contempt
    synonyms: Bronx cheer, boo, hiss, hoot, raspberry, razz, razzing, snort
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    type of:
    call, cry, outcry, shout, vociferation, yell
    a loud utterance; often in protest or opposition
  6. noun
    informal terms for a (young) woman
    synonyms: chick, dame, doll, skirt, wench
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