• synonyms


See more synonyms for forty-five on Thesaurus.com
  1. a cardinal number, 40 plus 5.
  2. a symbol for this number, as 45 or XLV.
  3. a set of this many persons or things.
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  1. amounting to 45 in number.
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noun, plural .45s, .45's.
  1. a pistol, revolver, or cartridge of .45-caliber, or having a diameter of .45 inch.
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noun, plural 45s, 45's.
  1. a seven-inch phonograph record played at 45 r.p.m., especially a popular-music single.
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Origin of 45

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for forty-five

rod, gun, firearm, handgun, piece, rifle, cannon, pistol, shotgun, revolver, mortar, hardware, six-shooter, forty-five, ordnance, musket, difference, equalizer, Uzi, howitzer

Examples from the Web for forty-five

Contemporary Examples of forty-five

Historical Examples of forty-five

British Dictionary definitions for forty-five


  1. a gramophone record played at 45 revolutions per minute
  2. US and Canadian a pistol having .45 calibre
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  1. the Forty-Five British history another name for Jacobite Rebellion (def. 2)
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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