Antonyms for definite

all:

indefinite.

exact, clear:

unclear, vague, equivocal, obscure, unfixed, uncertain, not clear, ambiguous, undefined, questionable, fuzzy, unlimited, indistinct, inexact, indefinite, doubtful, indeterminate, imprecise, unsure.

noun:

incomprehensible, largish, voluminous, escalated, super, expanded, Dimensionless, countless, copious, plenitudinous, dubious, implicit, goodly, jumbo, substantial, unintelligible, cosmopolitan, sizable, hefty, expansive, immeasurable, innumerable, restricted, unspecific, inclusive, plentiful, respectable, whacking, broad, circuitous, comprehensive, hulking, incalculable, oversize, unreserved, ample, incorrect, implied, inexhaustible, great, grandiose, bulky, handsome, epic, big, enlarged, extensive, king-size, vast, major, whole, considerable, bumper, sweeping, large, unmeasured, indeterminate, universal, global, qualified, inestimable.

Paraphrases for Definite:

• Adjective :
  abject, absolute, absolutely, abstract, accurate, action-oriented, actual, acute, adamant, affirmative, affirmed, agreed, all-out, allotted, ambiguous, ample, anti-dumping, apparent, applicable, appreciable, articulate, articulated, ascertained, assertive, assured, authentic, authoritative, automatic, aware, axiomatic, big, binding, blatant, blunt, bold, brief, bright, broad, broad-based, candid, careful, case-specific, categorical, causal, certain, Claire, Clare, clean, clear, clear-cut, clearly-defined, cogent, coherent, committed, compelling, complete, comprehensible, comprehensive, concerted, concise, conclusive, concrete, confident, confirmed, conscious, considerable, conspicuous, convinced, convincing, correct, country-specific, credible, crisp, critical, crucial, crystal-clear, decided, deciding, decisive, declared, dedicated, deep, define, defined, defining, definitive, deliberate, delineated, demonstrable, demonstrated, dependent, detailed, determinant, determinate, determinative, determine, determined, deterministic, developed, discernible, discrete, distinct, distinctive, diverse, doubtful, down-to-earth, dramatic, durable, effective, elaborate, emphatic, empirical, end-state, enforceable, ensured, essential, established, eventual, evident, exact, explicit, express, extensive, factual, Familiar, far-reaching, fast, final, finalised, finalized, finished, finite, firm, First-hand, fixed, flagrant, flat, flat-rate, flow-through, focused, follow-on, follow-up, followup, forceful, formal, formalized, forthright, full-blown, full-fledged, full-scale, fully-fledged, genuine, given, glaring, grave, great, guaranteed, hands-on, hard, hard-hitting, high, honest, huge, identifiable, identified, identify, identifying, imperative, important, impressive, inaccurate, incisive, inconclusive, incontestable, incontrovertible, incorrect, indefinite, indisputable, individual, inescapable, inevitable, inexorable, informative, inherent, instrumental, insured, integral, irrefutable, irreversible, key, labelled, landmark, large, large-scale, lasting, limited, little, logical, loud, lucid, major, mandatory, manifest, marked, massive, matter-of-fact, meaningful, measurable, meticulous, moderate, modest, monitored, much, namely, narrow, natural, neat, necessary, needed, net, notable, noticeable, numerical, obligatory, obvious, on-farm, on-the-ground, once-and-for-all, one-off, outright, overriding, overt, overwhelming, own, palpable, paramount, particular, perceptible, peremptory, permanent, pertinent, physical, pinpointed, pivotal, plain, pointed, positive, powerful, practical, pragmatic, precise, predefined, predicate, predictable, prescribed, preset, prevalent, probative, prominent, pronounced, proper, proven, purposeful, questionable, ready, real, real-life, real-world, realistic, refined, reliable, remarkable, required, resounding, restricted, right, rigid, rigorous, robust, safe, salient, satisfied, scheduled, secure, secured, select, selected, self-evident, self-explanatory, sensed, serious, severe, sharp, sheer, short, significant, single, single-minded, sizeable, slight, slit, solid, sound, specifies, stable, stark, stated, stationary, staunch, steadfast, steady, steep, Stipulated, straight, straightforward, strict, striking, stringent, strong, structured, substantial, substantiated, substantive, sweeping, sweet, tactical, tangible, Targeted, terminal, thematic, thorough, tight, time-bound, timely, top, topical, tough, tracked, transparent, true, ultimate, unambiguous, unanimous, unassailable, unavoidable, uncertain, unchallenged, unclear, uncompromising, unconditional, unconfirmed, uncontested, uncontroversial, undefined, undeniable, undetermined, undisputable, undisputed, undoubted, unequivocal, unfailing, unfettered, unique, unlimited, unmistakable, unmistakeable, unmitigated, unqualified, unquestionable, unquestioned, unsafe, unspecified, unswerving, unwavering, utmost, utter, vague, vast, veritable, vigorous, visible, vital, vivid, vocal, watershed, watertight, well-, well-defined, well-developed, well-drafted, well-established, wholehearted, wide, wide-ranging, widespread, workable.
• Noun, singular or mass :
  determinate.
• Proper noun, singular :
  certain, defined.