duration

1 the period during which something exists, lasts, or is in progress <for the whole duration of the speech the bored audience fidgeted> Synonyms continuance, date, life, life span, lifetime, run, standing, time Related Words spell, stretch; span, tenure, term; hitch, tour, turn; half-life; age, longevity

2 uninterrupted or lasting existence <scientists warning that the very duration of our civilization depends upon finding a solution to this major environmental problem> Synonyms abidance, ceaselessness, continuance, continuity, continuousness, durability, continuation, endurance, persistence, subsistenceRelated Words drawing out, elongation, extension, lengthening, prolongation, prolonging, stretching; enduringness, permanence; survivalNear Antonyms abridgment (or abridgement), curtailment, cutback, shorteningAntonyms cessation, close, discontinuance, discontinuity, end, ending, expiration, finish, stoppage, surcease, termination