decisive

1 fully committed to achieving a goal only a team with a decisive attitude is going to win a state championship Synonyms bent (on or upon), bound, determined, do-or-die, firm, hell-bent (on or upon), intent, out, purposeful, resolute, resolved, set, single-mindedRelated Words bitter, vehement; certain, cocksure, confident, positive, sure; earnest, serious; steady, unfaltering, unhesitating, unswerving, unwavering; adamant, adamantine, dogged, hard, hardened, hardheaded, headstrong, immovable, implacable, inflexible, mulish, obdurate, persistent, pertinacious, perverse, pigheaded, rigid, self-willed, stubborn, tenacious, unbending, uncompromising, unrelenting, unyielding, willful (or wilful)Near Antonyms distrustful, doubtful, dubious, mistrustful, skeptical, suspicious, uncertain, unconvinced, undecided, unsettled, unsure; disinclined, indisposed, loath (also loth or loathe), reluctantAntonyms faltering, hesitant, indecisive, irresolute, undetermined, unresolved, vacillating, wavering, weak-kneed

2 having the power to persuade a lawyer who knows how to construct the kind of decisive argument that sways a jury Synonyms compelling, conclusive, convincing, cogent, effective, forceful, persuasive, satisfying, strong, tellingRelated Words authoritative, definitive; sound, valid, well-founded; important, significant, weighty; material, pertinent, relevantNear Antonyms groundless, invalid, shaky, unfounded, unsound; inconsequential, insignificant, unimportant; immaterial, irrelevant; feeble, weakAntonyms inconclusive, indecisive, ineffective, uncompelling, unconvincing, unpersuasive

3 serving to put an end to all debate or questioning the decisive finding of the coroner regarding the cause of death Synonyms absolute, clear, deciding, conclusive, definitive, lastRelated Words determinate, determinative, dispositive, hands-down, inarguable, incontestable, incontrovertible, indisputable, indubitable, irrefutable, unanswerable, undebatable, undeniable, undisputable, unquestionable; unchallenged, uncontested, undisputed; unambiguous, unequivocal; certain, definite, positive, sure; cogent, compelling, convincing, persuasive, tellingNear Antonyms debatable, disputable, doubtable, doubtful, moot, problematic (also problematical), questionable, refutable; ambiguous, equivocal; controversial, debated, disputedAntonyms inconclusive, indecisive, unclear