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[am-yuh-nish-uh n] /ˌæm yəˈnɪʃ ən/
the material fired, scattered, dropped, or detonated from any weapon, as bombs or rockets, and especially shot, shrapnel, bullets, or shells fired by guns.
the means of igniting or exploding such material, as primers, fuzes, and gunpowder.
any material, means, weapons, etc., used in any conflict:
a crude ammunition of stones.
information, advice, or supplies to help defend or attack a viewpoint, argument, or claim:
Give me some ammunition for the debate.
Obsolete. any military supplies.
1620-30; < Middle French amonitions, amunitions (plural) military supplies (a- a-5 + munition < Latin; see munition), or < French la munition, wrongly analyzed as l'amunition Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for ammunition
  • The ammunition had been cobbled together from multiple sources.
  • Should there ever be an infringement later, you'll be glad to have this additional ammunition.
  • What does come as a shock, though, is the unmistakable sound of live ammunition.
  • They also carried supplies of rope, tools, and ammunition.
  • In today's politically charged environment, though, these routine corrections have become ammunition in the warming war.
  • There is a video game in which players fire antibiotic ammunition at bacteria.
  • Behind them, thousands of rounds of ammunition were laid out on the ground.
  • As an added bonus, the government supplies ammunition free of charge.
  • The overflowing demand is spilling into the ammunition business.
  • If the buyer has a reputation for being lawsuit happy, you do not want to risk giving her any ammunition.
British Dictionary definitions for ammunition


any projectiles, such as bullets, rockets, etc, that can be discharged from a weapon
bombs, missiles, chemicals, biological agents, nuclear materials, etc, capable of use as weapons
any means of defence or attack, as in an argument
Word Origin
C17: from obsolete French amunition, by mistaken division from earlier la munition; see munition
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ammunition

1620s, from French soldiers' faulty separation of Middle French la munition into l'ammunition; from Latin munitionem (nominative munitio) "a fortifying" (see munition), and at first meaning all military supplies in general. The mistake in the word perhaps was by influence of French a(d)monition "warning." The error was corrected in French (Modern French munition), but retained in English.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for ammunition



: The fat ammo barge rocked up and down

  1. Ammunition: The platoon is out of ammo (1930+)
  2. Information and other material that may be used in a debate, campaign, expose´, etc: Your shabby personal life gives lots of ammo to the opposition
  3. Toilet paper

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Encyclopedia Article for ammunition

the projectiles and propelling charges used in small arms, artillery, and other guns. Ammunition size is usually expressed in terms of calibre, which is the diameter of the projectile as measured in millimetres or inches. In general, projectiles less than 20 mm or .60 inch in diameter are classified as small-arm, and larger calibres are considered artillery. A complete round of ammunition consists of all the components necessary for one firing of the gun. These normally include a projectile, the propellant, and a primer that ignites the propellant. Other components such as cartridge case, fuze, and bursting charge are frequently included.

Learn more about ammunition with a free trial on
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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