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forty-five

[fawr-tee-fahyv]
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noun
  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.
adjective
  1. amounting to 45 in number.

.45

noun, plural .45s, .45's.
  1. a pistol, revolver, or cartridge of .45-caliber, or having a diameter of .45 inch.

45

noun, plural 45s, 45's.
  1. a seven-inch phonograph record played at 45 r.p.m., especially a popular-music single.

Origin of 45

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

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British Dictionary definitions for forty-five

forty-five

noun
  1. a gramophone record played at 45 revolutions per minute
  2. US and Canadian a pistol having .45 calibre

Forty-Five

noun
  1. the Forty-Five British history another name for Jacobite Rebellion (def. 2)
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