the twenty-fourth part of a day; sixty minutes.-the time of the day, as expressed in hours and minutes, and indicated by a timepiece; as, what is the hour? at what hour shall we meet?-fixed or appointed time; conjuncture; a particular time or occasion; as, the hour of greatest peril; the man for the hour.-certain prayers to be repeated at stated times of the day, as matins and vespers.-a measure of distance traveled.