at the top of the hour
phrase
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.
Cite this Entry
“At the top of the hour.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/at%20the%20top%20of%20the%20hour. Accessed 10 Mar. 2026.
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