functional

1 being in effective operation I don't think that vending machine is functional, so don't put money into it Synonyms alive, active, functioning, going, live, living, on, operating, operational, operative, running, workingRelated Words effective, effectual; employable, operable, usable (also useable), viable, workable; performing, producing, productive, serving, useful, yielding; astir, bustling, busy, dynamic, flourishing, humming, roaring, thrivingNear Antonyms deactivated, decommissioned; ineffective, ineffectual, useless; inoperable, unusable, unworkable; arrested, asleep, dormant, fallow, idle, inert, latent, lifeless, nonproductive, quiescent, sleepy, stagnating, unproductive, vegetatingAntonyms broken, dead, inactive, inoperative, kaput (also kaputt), nonactivated, nonfunctional, nonfunctioning, nonoperating, nonoperational, nonoperative

2 capable of being put to use or account a functional knowledge of auto mechanics Synonyms actionable, applicable, applicative, applied, practical, practicable, serviceable, ultrapractical, usable (also useable), useful, workable, workingRelated Words down-to-earth, pragmatic (also pragmatical), utilitarian; banausic, mundane; accessible, available, obtainable, reachable; all-around (also all-round), handy; active, alive, busy, employed, functioning, operating, operativeNear Antonyms abstract, academic (also academical), armchair, theoretical (also theoretic); inaccessible, unattainable, unavailable, unobtainable, unreachable; unsuitableAntonyms impracticable, impractical, inapplicable, nonpractical, unusable, unworkable, useless

3 capable of or suitable for being used for a particular purpose a very functional kitchen utensil for peeling potatoes Synonyms available, employable, exploitable, fit, usable, operable, practicable, serviceable, usefulRelated Words applicable, relevant; doable, feasible, viable, workable; reusableAntonyms impracticable, inoperable, nonfunctional, unavailable, unemployable, unusable