Definition of hour
1
: a time or office for daily liturgical devotion;
especially
: canonical hour
2
: the 24th part of a day : 60 minutes
3 a
: the time of day reckoned in two 12-hour periods
b
hours plural
: the time reckoned in one 24-hour period from midnight to midnight using a 4-digit number of which the first two digits indicate the hour and the last two digits indicate the minute
- in the military 4:30 p.m. is called 1630 hours
4 a
: a customary or particular time
- lunch hour
- in our hour of need
- hero of the hour
b
hours plural
: time of going to bed
- keeps late hours
- banker's hours
5
: an angular unit of right ascension equal to 15 degrees measured along the celestial equator
6
: the work done or distance traveled at normal rate in an hour
- the city was two hours away
7 a
: a class session
b
: credit hour, semester hour
—
after hours
: after the regular quitting or closing time
