Simple Definition of quarter hour
: 15 minutes : a period of time that lasts for 15 minutes
Full Definition of quarter hour
1 : fifteen minutes
2 : any of the quarter points of an hour
3 : a unit of academic credit representing an hour of class (as lecture class) or three hours of laboratory work each week for an academic quarter
Examples of quarter hour in a sentence
Trains depart every quarter hour.
I waited a quarter hour in line.
First Known Use of quarter hour
Seen and Heard
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