n. A particular time; a fixed or appointed time; a set season: as, the hour of death.n. The time marked or indicated by a timepiece; the particular time of day: as, what is the hour? at what hour shall we meet?n. The twenty-fourth part of a civil day, or the twelfth part of a natural day or night.n. plural Set times of prayer; the canonical hours (which see, under canonical).n. The offices or services prescribed for the canonical hours, or a book containing them. See book of hours, below.n. In Greek myth, one of the Horæ or Hours, the goddesses of the seasons and guardians of the gates of heaven.n. The hour reckoned from sunrise as the beginning of the day.n. In astronomy and geography, an angular measure of right ascension or longitude, being the twenty-fourth part of a great circle of the sphere, or fifteen degrees.n. One hour in a shop. In many technical schools students are required to spend a certain number of hours in workshops. These are called shop-hours, to distinguish them from the hours spent in the recitation-room.