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.
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.
First recorded in 1945–50
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Spivey's .45 caliber, like most firearms, ejects casingsbehind and to the right.
From The Wall Street Journal • Dec. 21, 2025
Hours later he would come ashore with a .45 pistol, pencils, and a sketchbook.
From Slate • Jun. 6, 2025
Baldwin thought his Colt .45 revolver was empty as he began rehearsing a scene in a wooden chapel at the popular movie location Bonanza Creek Ranch, just south of Santa Fe.
From Los Angeles Times • Feb. 21, 2024
He has maintained he did not pull the trigger of the Colt .45 pistol and only drew back its hammer.
From BBC • Feb. 20, 2024
In .45 of a second an android equipped with such a brain structure could assume any one of fourteen basic reaction-postures.
From "Do Androids Dream of Electric Sheep?" by Philip K. Dick
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
