| Duration (n.) The period of time during which anything lasts; continuance in time; the portion of time during which anything exists. Thesaurus Entries abidingness, age, antiquity, changelessness, chronology, constancy, continuance, continuation, continuity, defeat of time, defiance of time, diuturnity, durability, durableness, duree, endurance, firmness, fixedness, frozenness, hardening, immobility, immovability, immovableness, immutability, invariability, invariableness, inveteracy, lastingness, long standing, long-lastingness, long-livedness, longevity, maintenance, perdurability, perennation, period, permanence, permanency, perpetualness, perpetuity, persistence, persistency, psychological time, quiescence, rigidity, run, solidity, space, space-time, span, spell, stability, standing, stasis, steadfastness, survival, survivance, tense, tenure, term, the future, the past, the present, tide, time, timebinding, torpor, unchangeability, unchangingness, while |