[ fawr-tee fahyv ]
See synonyms for 45 on Thesaurus.com
  1. plural 45s, 45's. a seven-inch phonograph record played at 45 r.p.m., especially a popular-music single: She’s in the market for a phonograph so she can play her grandfather’s mint collection of 45s from the 1960s.

  2. an identifier of or nickname for Donald Trump, the 45th U.S. president, alternately used with disparaging intent by opponents and with affection by supporters.

Origin of 45

First recorded in 1945–50

Words Nearby 45

Other definitions for .45 (2 of 2)


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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use 45 in a sentence

  • He qualified as “sharpshooter” on the M1911A1-45 ACP handgun in 1994.

  • In the tropical magnificence of Tasso's stanzas there is a sultry stupor which the fresh sunlight-45- of the Furioso never sheds.

  • A Colts-45 was not a joke; its mechanism had not been connived in any spirit of facetiousness.

    The Sunset Trail | Alfred Henry Lewis
  • Then, in the third-45- place, it must be straight to the point, and directly called for as an illustration of the case in hand.

    Social Life | Maud C. Cooke
  • After two marches the temperature fell to-45°, and it was very cold in the small silk tent.

    From Pole to Pole | Sven Anders Hedin
  • I just cast about.-45- But I know a frightful lot of painters.

    Marriage | H. G. Wells