Hour

noun

1. A time period of sixty minutes; one twenty-fourth of a day.

   "I spent an hour at lunch."

2. A season, moment, or time.
3. The time.

   "The hour grows late and I must go home."

4. (in the plural) Used after a two-digit hour and a two-digit minute to indicate time.
5. (in the plural) The set times of prayer, the canonical hours, the offices or services prescribed for these, or a book containing them.