tail

The part of a dog's body that wags enthusiastically when the dog is happy is the tail. In mammals, tails are actually an extension of the spinal column.

Tails serve various purposes in different animals. A fish's tail helps it move through the water, a cow's tail is a built-in fly swatter, and a scorpion uses its tail for self-defense. This noun also means simply "back end," like the tail of an airplane or the tail of a suit jacket. Colloquially, to tail someone means to follow them secretly.

Definitions of tail
  1. noun
    the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body
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    types:
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    rattle
    loosely connected horny sections at the end of a rattlesnake's tail
    brush
    a bushy tail or part of a bushy tail (especially of the fox)
    bob, bobtail, dock
    a short or shortened tail of certain animals
    caudal appendage
    tail especially of a mammal posterior to and above the anus
    uropygium
    posterior part of a bird's body from which the tail feathers grow
    oxtail
    the skinned tail of cattle; used especially for soups
    fluke
    either of the two lobes of the tail of a cetacean
    scut
    a short erect tail
    flag
    a conspicuously marked or shaped tail
    type of:
    appendage, outgrowth, process
    a natural prolongation or projection from a part of an organism either animal or plant
  2. noun
    any projection that resembles the tail of an animal
    synonyms: tail end
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    type of:
    projection
    any solid convex shape that juts out from something
  3. noun
    the fleshy part of the human body that you sit on
    synonyms: ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail end, tooshie, tush
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    type of:
    body part
    any part of an organism such as an organ or extremity
  4. noun
    the rear part of an aircraft
    synonyms: empennage, tail assembly
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    type of:
    back, rear
    the side that goes last or is not normally seen
  5. noun
    the rear part of a ship
    synonyms: after part, poop, quarter, stern
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    type of:
    back, rear
    the side that goes last or is not normally seen
  6. verb
    remove or shorten the tail of an animal
    synonyms: bob, dock
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    type of:
    cut
    separate with or as if with an instrument
  7. verb
    remove the stalk of fruits or berries
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    type of:
    pinch, top
    cut the top off
  8. noun
    the time of the last part of something
    “the tail of the storm”
    synonyms: fag end, tail end
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    type of:
    end, ending
    the point in time at which something ends
  9. noun
    a spy employed to follow someone and report their movements
    synonyms: shadow, shadower
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    type of:
    follower
    someone who travels behind or pursues another
    spy
    a secret watcher; someone who secretly watches other people
  10. verb
    go after with the intent to catch
    synonyms: chase, chase after, dog, give chase, go after, tag, track, trail
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    types:
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    tree
    chase an animal up a tree
    quest
    search the trail of (game)
    hound, hunt, trace
    pursue or chase relentlessly
    run down
    pursue until captured
    ferret
    hound or harry relentlessly
    type of:
    follow, pursue
    follow in or as if in pursuit
  11. noun
    (usually plural) the reverse side of a coin that does not bear the representation of a person's head
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    Antonyms:
    head
    (usually plural) the obverse side of a coin that usually bears the representation of a person's head
    type of:
    reverse, verso
    the side of a coin or medal that does not bear the principal design
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