<p><strong>Noun:</strong></p><ul><li>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.</li><li>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: He slept for the hour between 2 and 3 a.m.</li><li>any specific time of day; the time indicated by a timepiece: What is the hour?</li><li>a short or limited period of time: He savored his hour of glory.</li><li>a particular or appointed time: What was the hour of death? At what hour do you open?</li><li>a customary or usual time: When is your dinner hour?</li><li>the present time: The magazine had an interview with the man of the hour, star of the hottest new superhero movie.</li><li>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.</li><li>customary time of going to bed and getting up: Actors often keep late hours.</li><li>(in the Christian church) the seven stated times of the day for prayer and devotion.</li><li>the offices or services prescribed for the seven stated times of the day for prayer and devotion.</li><li>a book containing the seven stated times of the day for prayer and devotion.</li><li>distance normally covered in an hour's traveling: We live about an hour from the city.</li><li>Astronomy: a unit of measure of right ascension representing 15°, or the twenty-fourth part of a great circle.</li><li>a single period, as of class instruction or therapeutic consultation, usually lasting from 40 to 55 minutes. Compare clock-hour.</li><li>Education: Also called credit hour: one unit of academic credit, usually representing attendance at one scheduled period of instruction per week throughout a semester, quarter, or term.</li><li>the Hours, Classical Mythology: the Horae.</li></ul><p><strong>Adjective:</strong></p><ul><li>of, relating to, or noting an hour.</li></ul><p><strong>End of Response</strong></p>