at all hours

Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia.

at all hours (of the day and night)

at any time of the day or night They keep calling me on the phone at all hours to ask questions I've already answered.
See also: all, hour

at all hours (of the night)

very late at night How do you expect me to sleep when you're playing loud music at all hours?
See also: all, hour