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on the hour



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Idioms and Phrases

At every hour exactly; one o'clock, two o'clock, and so on. For example, The shuttle to New York departs on the hour . An extension of this idiom is every hour on the hour , meaning every time the clock's big hand reaches twelve, as in The bus passes by the house every hour on the hour .

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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.

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