n (uncountable) How much of a day has passed; the moment, as indicated by a clock or similar device.
! (tennis) reminder by the umpire for the players to continue playing after their pause
n (uncountable) The inevitable progression into the future with the passing of present events into the past.
n (uncountable) A quantity of availability of duration.
n (countable) A measurement of a quantity of time; a numerical or general indication of a length of progression.
n (uncountable|slang) The serving of a prison sentence.
n (countable) A particular moment or hour; the appropriate moment or hour for something (especially with prepositional phrase or imperfect subjunctive).
n (countable) The measurement under some system of region of day or moment.
n (countable) A numerical indication of a particular moment.