- 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 24 periods of 60 minutes, 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?
- a customary or usual time: When is your dinner hour?
- the present time: The magazine had an interview with the man of the hour, star of the hottest new superhero movie.
- hours,
- time spent in an office, factory, or the like, or for work, study, etc.: The doctor's hours were from 10 to 4. What employees do after hours is their own business.
- customary time of going to bed and getting up: Actors often keep late hours.
- (in the Christian church) the seven stated times of the day for prayer and devotion.
- the offices or services prescribed for the seven stated times of the day for prayer and devotion.
- a book containing the seven stated times of the day for prayer and devotion.
- distance normally covered in an hour's traveling: We live about an hour from the city.
- a unit of measure of right ascension representing 15°, or the twenty-fourth part of a great circle.
- a single period, as of class instruction or therapeutic consultation, usually lasting from 40 to 55 minutes.
- one unit of academic credit, usually representing attendance at one scheduled period of instruction per week throughout a semester, quarter, or term.
- the Horae.
- of, relating to, or noting an hour.
- one's hour,
- the instant of death: The sick man knew that his hour had come.
- any crucial moment.
- a period of time equal to 3600 seconds; 1/24 th of a calendar day
- any of the points on the face of a timepiece that indicate intervals of 60 minutes
- an exact number of complete hours
- the time of day as indicated by a watch, clock, etc
- the period of time allowed for or used for something
- a special moment or period
- the present time
- the distance covered in an hour
- an angular measurement of right ascension equal to 15° or a 24th part of the celestial equator
- one's hour
- a time of success, fame, etc
- the time of one's death
- to do something in a leisurely manner
