a period of time equal to one twenty-fourth of a mean solar or civil day and equivalent to 60 minutes: He slept for an hour.
any specific one of these 24 periods, usually reckoned in two series of 12, one series from midnight to noon and the second from noon to midnight, but sometimes reckoned in one series of 24, from midnight to midnight: He slept for the hour between 2 and 3 a.m. The hour for the bombardment was between 1300 and 1400.
any specific time of day; the time indicated by a timepiece: What is the hour?
a short or limited period of time: He savored his hour of glory.
a particular or appointed time: What was the hour of death? At what hour do you open?