down ‧ time /ˈdaʊntaɪm/ BrE AmE noun [uncountable]
1 . the time when a computer is not working
2 . ( also down time ) informal a period of time when you have finished what you were doing, and you can relax or do something that you had not originally planned to do:
Often, during semesters, you have down time when you can do some exercise.
—downtime adjective :
downtime activities for teachers