Definitions of hours

n an indefinite period of time

“they talked for hours
Type of:
period, period of time, time period
an amount of time

n a period of time assigned for work

“they work long hours
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duty period, shift, work shift
the time period during which you are at work
go, spell, tour, turn
a time for working (after which you will be relieved by someone else)
a period of work or duty
a period of time (4 or 2 hours) during which some of a ship's crew are on duty
day shift
the work shift during the day (as 8 a.m. to 4 p.m.)
evening shift, swing shift
the work shift during the evening (as 4 p.m. to midnight)
graveyard shift, night shift
the work shift during the night (as midnight to 8 a.m.)
split shift
a working shift divided into two periods of time with several hours in between
Type of:
work time
a time period when you are required to work

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