English definition of “hour”
60 MINUTES [C] › a period of time equal to 60 minutes: half an hour The store is open 24 hours a day. It's a six-hour flight. The job pays $5 an hour.
PERIOD OF TIME [C] › the period of time when a particular activity happens or when a shop or public building is open: [usually plural] working hours Our opening hours are from 8 to 6. I've got to go to the bank UK in my lunch hour/US on my lunch hour.
hours informal › a long time: I spent hours doing my homework.
the hour › the point when a new hour begins: The train leaves at two minutes past the hour. My watch beeps on the hour.
all hours › very late at night, until early morning, or almost all the time: Our neighbours are up till all hours every night, playing loud music.
the early/small hours › the hours between midnight and the time that the sun rises → See also rush hour