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