Fly describes moving through the air, like birds that fly in the sky, or getting something accepted, like your silly excuse that's not going to fly with your history teacher.

Fly means "move through the air with wings," and it describes the movement of birds, airplanes, kites, and other things that float or move of their own accord above the ground. There are many other meanings of fly, including a buzzing insect with wings, a baseball hit high across a field, and the zipper on a pair of pants. As an adjective, fly means cool, though there's no guarantee it's still fly to use it.

Primary Meanings of fly

travel through the air; be airborne
two-winged insects characterized by active flight
(baseball) a hit that flies up in the air
hit a fly
move quickly or suddenly
flap consisting of a piece of canvas that can be drawn back to provide entrance to a tent
(British informal) not to be deceived or hoodwinked
Full Definitions of fly

v travel through the air; be airborne

“Man cannot fly
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fly low
fly in high wind
fly in a flock
fly on
continue flying
fly upwards or high in the sky
hang in the air; fly or be suspended above
be motionless, in suspension
Type of:
go, locomote, move, travel
change location; move, travel, or proceed, also metaphorically

v cause to fly or float

fly a kite”
fly a kite

v display in the air or cause to float

fly a kite”
“All nations fly their flags in front of the U.N.”
Type of:
make visible or noticeable

v operate an airplane

“The pilot flew to Cuba”
aviate, pilot
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fly blind
fly an airplane solely by relying on instruments
fly contact
fly a plane by using visible landmarks or points of reference
fly alone, without a co-pilot or passengers
test fly
test a plane
fly a jet plane
fly in or as if in a glider plane
hydroplane, seaplane
glide on the water in a hydroplane
ride in a hot-air balloon
flat-hat, hedgehop
fly very close to the ground
hang glide, soar
fly by means of a hang glider
soar or fly like a kite
sailplane, soar
fly a plane without an engine
Type of:
control, operate
handle and cause to function

v travel in an airplane

“she is flying to Cincinnati tonight”
“Are we driving or flying?”
aviate, pilot
operate an airplane
travel on an overnight flight
Type of:
undergo transportation as in a vehicle

v travel over (an area of land or sea) in an aircraft

“Lindbergh was the first to fly the Atlantic”
travel through the air; be airborne
aviate, pilot
operate an airplane
Type of:
journey, travel
travel upon or across

v transport by aeroplane

“We fly flowers from the Caribbean to North America”
aviate, pilot
operate an airplane
airlift, lift
fly people or goods to or from places not accessible by other means
Type of:
carry, transport
move while supporting, either in a vehicle or in one's hands or on one's body

n two-winged insects characterized by active flight

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Musca domestica, house fly, housefly
common fly that frequents human habitations and spreads many diseases
glossina, tsetse, tsetse fly, tzetze, tzetze fly
bloodsucking African fly; transmits sleeping sickness etc.
blow fly, blowfly
large usually hairy metallic blue or green fly; lays eggs in carrion or dung or wounds
Sarcophaga carnaria, flesh fly
fly whose larvae feed on carrion or the flesh of living animals
tachina fly
bristly fly whose larvae live parasitically in caterpillars and other insects; important in control of noxious insects
any of various large flies that annoy livestock
bee fly
hairy nectar-eating fly that resembles a bee; larvae are parasitic on larvae of bees and related insects
Haematobia irritans, horn fly
small black European fly introduced into North America; sucks blood from cattle especially at the base of the horn
Calliphora vicina, bluebottle
blowfly with iridescent blue body; makes a loud buzzing noise in flight
greenbottle, greenbottle fly
blowfly with brilliant coppery green body
stout-bodied hairy dipterous fly whose larvae are parasites on humans and other mammals
warble fly
hairy bee-like fly whose larvae produce lumpy abscesses (warbles) under the skin of cattle
cleg, clegg, horse fly, horsefly
large swift fly the female of which sucks blood of various animals
Type of:
dipteran, dipteron, dipterous insect, two-winged insects
insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing

n fisherman's lure consisting of a fishhook decorated to look like an insect

dry fly
a fly (fisherman's lure) that skims the surface of the water
streamer fly
an artificial fly that has wings extending back beyond the crook of the fishhook
wet fly
fisherman's fly that floats under the surface of the water
Type of:
fish lure, fisherman's lure
(angling) any bright artificial bait consisting of plastic or metal mounted with hooks and trimmed with feathers

n (baseball) a hit that flies up in the air

fly ball
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a very long fly ball
pop fly, pop-fly, pop-up
a short high fly ball
line drive, liner
(baseball) a hit that flies straight out from the batter
(baseball) a fly ball hit a short distance into the outfield
Texas leaguer
(baseball) a fly ball that falls between and infielder and an outfielder
Type of:
hit, hitting, striking
the act of contacting one thing with another

v hit a fly

Type of:
cause to move by striking

v move quickly or suddenly

“He flew about the place”
Type of:
move so as to change position, perform a nontranslational motion

v run away quickly

flee, take flight
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make a rupture in the ranks of the enemy or one's own by quitting or fleeing
run away in a stampede
abscond, absquatulate, bolt, decamp, go off, make off, run off
run away; usually includes taking something or somebody along
elope, run off
run away secretly with one's beloved
break loose, escape, get away
run away from confinement
retreat at full speed
defect, desert
desert (a cause, a country or an army), often in order to join the opposing cause, country, or army
break, break away, break out
move away or escape suddenly
escape from, shake, shake off, throw off
get rid of
run off without paying a debt
bilk, elude, evade
escape, either physically or mentally
move smoothly and easily
run away
escape from the control of
desert one's party or group of friends, for example, for one's personal advantage
escape, get away
remove oneself from a familiar environment, usually for pleasure or diversion
Type of:
break away, bunk, escape, fly the coop, head for the hills, hightail it, lam, run, run away, scarper, scat, take to the woods, turn tail
flee; take to one's heels; cut and run

v be dispersed or disseminated

“Rumors and accusations are flying
Type of:
go, locomote, move, travel
change location; move, travel, or proceed, also metaphorically

v change quickly from one emotional state to another

fly into a rage”
Type of:
undergo a change; become different in essence; losing one's or its original nature

v pass away rapidly

“Time flies like an arrow”
fell, vanish
vanish, vaporize
decrease rapidly and disappear
Type of:
elapse, glide by, go along, go by, lapse, pass, slide by, slip away, slip by
pass by

v decrease rapidly and disappear

vanish, vaporize
fell, vanish
pass away rapidly
Type of:
decrease, diminish, fall, lessen
decrease in size, extent, or range

n flap consisting of a piece of canvas that can be drawn back to provide entrance to a tent

fly sheet, rainfly, tent flap, tent-fly
Type of:
any broad thin and limber covering attached at one edge; hangs loose or projects freely

n an opening in a garment that is closed by a zipper or by buttons concealed under a fold of cloth

fly front
Type of:
a vacant or unobstructed space that is man-made

adj (British informal) not to be deceived or hoodwinked

alert, watchful
engaged in or accustomed to close observation

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