use-icon

HOW TO USE THE DICTIONARY

To look up an entry in The American Heritage Dictionary of the English Language, use the search window above. For best results, after typing in the word, click on the “Search” button instead of using the “enter” key.

Some compound words (like bus rapid transit, dog whistle, or identity theft) don’t appear on the drop-down list when you type them in the search bar. For best results with compound words, place a quotation mark before the compound word in the search window.

guide to the dictionary

use-icon

THE USAGE PANEL

The Usage Panel is a group of nearly 200 prominent scholars, creative writers, journalists, diplomats, and others in occupations requiring mastery of language. Annual surveys have gauged the acceptability of particular usages and grammatical constructions.

The Panelists

open-icon

AMERICAN HERITAGE DICTIONARY APP

The new American Heritage Dictionary app is now available for iOS and Android.

scroll-icon

THE AMERICAN HERITAGE DICTIONARY BLOG

The articles in our blog examine new words, revised definitions, interesting images from the fifth edition, discussions of usage, and more.

100-words-icon

See word lists from the best-selling 100 Words Series!

Find out more!

open-icon

INTERESTED IN DICTIONARIES?

Check out the Dictionary Society of North America at http://www.dictionarysociety.com

blow 1 (blō)
Share:
v. blew (bl), blown (blōn), blow·ing, blows
v.intr.
1.
a. To be in a state of motion. Used of the air or of wind.
b. To move along or be carried by the wind: Her hat blew away.
c. To move with or have strong winds: The storm blew all night.
2.
a. To expel a current of air, as from the mouth or from a bellows.
b. To produce a sound by expelling a current of air, as in sounding a wind instrument or a whistle.
c. To breathe hard; pant.
d. To release air or gas suddenly; burst or explode: The tire blew when it hit the pothole.
e. To spout moist air from the blowhole. Used of a whale.
3.
a. To fail or break down, as from being operated under extreme or improper conditions: The furnace blew during the cold snap.
b. To melt or otherwise become disabled. Used of a fuse.
4.
a. Informal To move very fast in relation to something: The boy blew past the stands on his bike.
b. Slang To go away; depart: It's time to blow.
5. Informal To boast.
6. Vulgar Slang To be disgustingly disagreeable or offensive: This movie blows.
v.tr.
1.
a. To cause to move by means of a current of air: The wind blew the boat out to sea.
b. To drive a current of air on, in, or through: blew my hair dry after I shampooed it.
c. To clear out or make free of obstruction by forcing air through: blew his nose all through allergy season.
d. To shape or form (glass, for example) by forcing air or gas through at the end of a pipe.
2.
a. To expel (air) from the mouth.
b. To cause air or gas to be expelled suddenly from: We blew a tire when we drove over the rock.
3. Music
a. To cause (a wind instrument) to sound.
b. To sound: a bugle blowing taps.
4.
a. To cause to be out of breath.
b. To allow (a winded horse) to regain its breath.
5. To demolish by the force of an explosion: An artillery shell blew our headquarters apart.
6. To lay or deposit eggs in. Used of certain insects.
7.
a. To cause to fail or break down, as by operating at extreme or improper conditions: blew the engine on the last lap.
b. To cause (a fuse) to melt or become disabled.
8. Slang
a. To spend (money) freely and rashly. See Synonyms at waste.
b. To spend money freely on; treat: blew me to a sumptuous dinner.
9.
a. Slang To spoil or lose through ineptitude: blew the audition; blew a three-goal lead. See Synonyms at botch.
b. To cause (a covert intelligence operation or operative) to be revealed and thereby jeopardized: a story in the press that blew their cover; an agent who was blown by the opposition.
10.
a. Slang To depart (a place) in a great hurry: Let's blow this city no later than noon.
b. Baseball To throw (a pitch) so fast that a batter cannot swing fast enough to hit it: blew a fastball by the batter for the strikeout.
11. Vulgar Slang To perform fellatio on.
n.
1. The act or an instance of blowing.
2.
a. A blast of air or wind.
b. A storm.
3. Informal An act of bragging.
4. Slang Cocaine.
Phrasal Verbs:
blow away Slang
1. To kill by shooting, especially with a firearm.
2. To defeat decisively.
3. To affect intensely; overwhelm: That concert blew me away.
blow in Slang
To arrive, especially when unexpected.
blow off
1. To relieve or release (pressure); let off.
2. Slang To choose not to attend or accompany: They wanted us to come along, but we blew them off.
blow out
1. To extinguish or be extinguished by a gust of air: blow out a candle.
2. To fail, as an electrical apparatus.
3. To erupt in an uncontrolled manner. Used of a gas or oil well.
4. To defeat decisively, as in a sport.
blow over
To subside, wane, or pass over with little lasting effect: The storm blew over quickly. The scandal will soon blow over.
blow up
1. To come into being: A storm blew up.
2. To fill with air; inflate: blow up a tire.
3. To enlarge (a photographic image or print).
4. To explode: bombs blowing up.
5. To lose one's temper.
Idioms:
blow a fuse/gasket Slang
To explode with anger.
blow hot and cold
To change one's opinion often on a matter; vacillate.
blow off steam
To give vent to pent-up emotion.
blow (one's) cool Slang
To lose one's composure.
blow (one's) mind Slang
To affect with intense emotion, such as amazement, excitement, or shock.
blow (one's) top/stack Informal
To lose one's temper.
blow/break open
To get a sudden, insurmountable lead in (an athletic contest).
blow out of proportion
To make more of than is reasonable; exaggerate.
blow smoke
1. To speak deceptively.
2. To brag or exaggerate.

[Middle English blowen, from Old English blāwan; see bhlē- in the Appendix of Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.