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English definition of “hour”

hour

noun     /aʊər/ US  /aʊr/
A1 [C] a period of 60 minutes: The exam lasted an hour and a half. There are 24 hours in a day. How many hours' sleep do you need? I'll be back in an hour's/two hours' time (= after one/two hours). The village is an hour from Doncaster/an hour away (= it takes an hour to travel there). He gets paid by the hour (= gets a particular amount of money for each hour he works). Trains leave every hour on the hour (= at exactly one o'clock, two o'clock, etc.). Buses leave at ten minutes past/to the hour (= at ten past/to one o'clock, two o'clock, etc.). War was declared at eighteen hundred/18.00 hours (= at six o'clock in the evening).Specific periods of time [C usually plural] the period of time when a particular activity happens or when a shop or public building is open: I did it in my lunch hour. office/working hours Our opening hours are from 8.00 to 6.00.Days and times of day C2 [C] a particular time during the day or night: Who could be phoning us at this unearthly/ungodly hour (= so late at night)? He returned in the early/small hours (= at night, after midnight).Points in time work long, regular, unsocial, etc. hours used to describe how many hours in the day you work or what part of the day you work: She's a nurse so she often works unsocial hours. He's paid well but he works long hours.Working hours and periods of workWork, working and the workplace for hours (and hours) B1 informal for a very long time: I waited for him for hours.Continue and last at all hours (of the day and night) C1 disapproving repeatedly during the day and the night: They keep ringing me up at all hours (of the day and night).Continually and repeatedly
(Definition of hour noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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