at the top of the hour

idiom

Definition of at the top of the hour

US

: at the beginning of the hour (at 12:00, 1:00, 2:00, etc.) The program is scheduled to start at the top of the hour.

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Dictionary Entries near at the top of the hour

at the top of one's lungs

at the top of one's/the class

at the top of one's voice

at the top of the hour

at the top of the list

at the top of the pile

at the vanguard

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marked by shyness and lack of polish

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