downtime

English Thesaurus

1. a period of time when something (as a machine or factory) is not operating (especially as a result of malfunctions) (noun.time)

hypernym	:	period, period of time, time period,
definition	:	an amount of time (noun.time)

antonym	:	uptime,
definition	:	a period of time when something (as a machine or factory) is functioning and available for use (noun.time)

antonym	:	uptime,
definition	:	a period of time when something (as a machine or factory) is functioning and available for use (noun.time)