To blow is to create a burst or puff of air. When chilly breezes start to blow, it's time to close your windows.

People blow candles out on birthday cakes and blow up balloons — a person blows by directing a flow of air from the mouth in a steady stream. When the wind blows, an air current moves. Another way to blow something is to burst, break, or ruin it: "If I drive over that broken glass, I'll blow a tire," or "I just know I'm going to blow my audition." You can also blow money, by wasting or squandering it.

Definitions of blow
  1. verb
    be in motion due to some air or water current
    “The leaves were blowing in the wind”
    synonyms: be adrift, drift, float
    move lightly, as if suspended
    cause to be carried by a current
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    be driven or carried along, as by the air
    be carried with the tide
    to extend, wave or float outward, as if in the wind
    type of:
    go, locomote, move, travel
    change location; move, travel, or proceed, also metaphorically
  2. verb
    cause to move by means of an air current
    “The wind blew the leaves around in the yard”
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    drive or carry as if by a puff of air
    type of:
    displace, move
    cause to move or shift into a new position or place, both in a concrete and in an abstract sense
  3. verb
    be blowing or storming
    “The wind blew from the West”
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    blow gently and lightly
    set in
    blow toward the shore
    blow gently
    blow hard
    blow in a squall
    bluster, gust
    blow hard; be gusty, as of wind
  4. verb
    cause air to go in, on, or through
    Blow my hair dry”
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    apply a draft or strong wind to
    type of:
    direct, send
    cause to go somewhere
  5. verb
    cause to be revealed and jeopardized
    “The story blew their cover”
    “The double agent was blown by the other side”
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    type of:
    break, bring out, disclose, discover, divulge, expose, give away, let on, let out, reveal, unwrap
    make known to the public information that was previously known only to a few people or that was meant to be kept a secret
  6. noun
    a strong current of air
    synonyms: blast, gust
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    a violent gusty wind
    a blast of wind laden with sand
    puff, puff of air, whiff
    a short light gust of air
    type of:
    air current, current, current of air, wind
    air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure
  7. verb
    exhale hard
    blow on the soup to cool it down”
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    gasp, heave, pant, puff
    breathe noisily, as when one is exhausted
    chuff, huff, puff
    blow hard and loudly
    blow or breathe hard on or into
    type of:
    breathe out, exhale, expire
    expel air
  8. verb
    free of obstruction by blowing air through
    blow one's nose”
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    type of:
    discharge, eject, exhaust, expel, release
    eliminate (a substance)
  9. verb
    spout moist air from the blowhole
    “The whales blew
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    type of:
    gush, spirt, spout, spurt
    gush forth in a sudden stream or jet
  10. verb
    play or sound a wind instrument
    “She blew the horn”
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    type of:
    cause to sound
  11. verb
    sound by having air expelled through a tube
    “The trumpets blew
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    type of:
    go, sound
    make a certain noise or sound
  12. verb
    make a sound as if blown
    “The whistle blew
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    type of:
    go, sound
    make a certain noise or sound
  13. verb
    allow to regain its breath
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    type of:
    give a rest to
  14. verb
    shape by blowing
    Blow a glass vase”
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    type of:
    form, shape
    give shape or form to
  15. verb
    provide sexual gratification through oral stimulation
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    type of:
    excite, stimulate, stir
    stir feelings in
  16. noun
    forceful exhalation through the nose or mouth
    “he gave his nose a loud blow
    “he blew out all the candles with a single puff”
    synonyms: puff
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    an act of blowing or breathing on or into something
    type of:
    breathing out, exhalation, expiration
    the act of expelling air from the lungs
  17. verb
    make a mess of, destroy or ruin
  18. verb
    spend thoughtlessly; throw away
    synonyms: squander, waste
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    conserve, economise, economize, husband
    use cautiously and frugally
    spend (significant amounts of money)
    type of:
    expend, use
    use up or consume fully
  19. verb
    spend lavishly or wastefully on
    “He blew a lot of money on his new home theater”
    squander, waste
    spend thoughtlessly; throw away
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    type of:
    drop, expend, spend
    pay out
  20. verb
    melt, break, or become otherwise unusable
    “The lightbulbs blew out”
    “The fuse blew
    synonyms: blow out, burn out
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    type of:
    break, break down, conk out, die, fail, give out, give way, go, go bad
    stop operating or functioning
  21. verb
    burst suddenly
    “The tire blew
    “We blew a tire”
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    type of:
    break open, burst, split
    come open suddenly and violently, as if from internal pressure
  22. noun
    a powerful stroke with the fist or a weapon
    “a blow on the head”
    synonyms: buffet
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    a backhanded blow
    a sharp slanting blow
    belt, knock, rap, whack, whang
    the act of hitting vigorously
    a hard blow with a flat object
    slap, smack, smacking
    the act of smacking something; a blow delivered with an open hand
    a very powerful blow with the fist
    a blow that knocks the opponent off his feet
    KO, kayo, knockout
    a blow that renders the opponent unconscious
    a sharp blow
    lash, whip, whiplash
    a quick blow delivered with a whip or whiplike object
    biff, clout, lick, poke, punch, slug
    (boxing) a blow with the fist
    a blow with the hand (usually on the ear)
    boot, kick, kicking
    the act of delivering a blow with the foot
    a return blow; a retaliatory blow
    a sweeping blow or stroke
    knife thrust, stab, thrust
    a strong blow with a knife or other sharp pointed instrument
    a sharp stinging blow
    a heavy blow with the hand
    a swinging blow directed upward (especially at an opponent's chin)
    hammer, hammering, pound, pounding
    the act of pounding (delivering repeated heavy blows)
    a blow hard enough to cause injury
    a severe blow
    TKO, technical knockout
    a knockout declared by the referee who judges one boxer unable to continue
    a slap with the flat of the hand
    counter, counterpunch, parry
    a return punch (especially by a boxer)
    KO punch, Sunday punch, haymaker, knockout punch
    a hard punch that renders the opponent unable to continue boxing
    a short swinging punch delivered from the side with the elbow bent
    a quick short straight punch
    rabbit punch
    a short chopping blow to the back of the neck
    sucker punch
    an unexpected punch
    (association football) a kick by the defending side after the attacking side sends the ball over the goal-line
    (rugby) an attempt to kick a goal
    punt, punting
    (football) a kick in which the football is dropped from the hands and kicked before it touches the ground
    place kick, place-kicking
    (sports) a kick in which the ball is placed on the ground before kicking
    (football) kicking (as for a field goal) in which the football is dropped and kicked as it touches the ground
    lunge, passado, straight thrust
    (fencing) an attacking thrust made with one foot forward and the back leg straight and with the sword arm outstretched forward
    (fencing) a second thrust made on the same lunge (as when your opponent fails to riposte)
    cheap shot
    an illegal and unsportsmanlike act of unnecessary violence
    type of:
    a single complete movement
  23. noun
    an impact (as from a collision)
    synonyms: bump
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    jar, jolt, jounce, shock
    a sudden jarring impact
    any violent blow
    rap, strike, tap
    a gentle blow
    bang, bash, belt, knock, smash
    a vigorous blow
    buffeting, pounding
    repeated heavy blows
    a glancing blow from or on the side of something (especially motor vehicles)
    slap, smack
    a blow from a flat object (as an open hand)
    type of:
    the striking of one body against another
  24. noun
    an unpleasant or disappointing surprise
    synonyms: shock
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    a sudden minor shock or meaningless interruption
    type of:
    a sudden unexpected event
  25. noun
    an unfortunate happening that hinders or impedes; something that is thwarting or frustrating
    synonyms: black eye, reversal, reverse, setback
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    a serious or devastating setback
    a minor or temporary error or setback
    type of:
    happening, natural event, occurrence, occurrent
    an event that happens
  26. verb
    leave; informal or rude
    Blow now!”
    synonyms: shove along, shove off
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    type of:
    depart, go, go away
    move away from a place into another direction
  27. noun
    street names for cocaine
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    type of:
    cocain, cocaine
    a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive
  28. verb
    lay eggs
    “certain insects are said to blow
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    type of:
    lay, put down, repose
    put in a horizontal position
  29. verb
    show off
    synonyms: bluster, boast, brag, gas, gasconade, shoot a line, swash, tout, vaunt
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    speak in a blustering or scornful manner
    crow, gloat, triumph
    dwell on with satisfaction
    congratulate, preen
    pride or congratulate (oneself) for an achievement
    type of:
    amplify, exaggerate, hyperbolise, hyperbolize, magnify, overdraw, overstate
    to enlarge beyond bounds or the truth
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