An interruption, break or pause.
A gap in a series, making it incomplete.
An opening in an organ.
A gap in geological strata.
A syllable break between two vowels, without an intervening consonant. (Compare diphthong.)
An unexpected break from work.
The intentional termination of an incomplete task after a time limit considered long enough for it to end normally.
The allowed maximal time for a process to end normally.