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WORDNET DICTIONARY

Adjective dubious has 3 senses

• dubious(s = adj.all) doubtful - fraught with uncertainty or doubt; "they were doubtful that the cord would hold"; "it was doubtful whether she would be admitted"; "dubious about agreeing to go"
Derived form noun dubiousness₁

• dubious(s = adj.all) doubtful, dubitable, in question - open to doubt or suspicion; "the candidate's doubtful past"; "he has a dubious record indeed"; "what one found uncertain the other found dubious or downright false"; "it was more than dubitable whether the friend was as influential as she thought"
Derived form noun dubiousness₂

• dubious(s = adj.all) Array - not convinced; "they admitted the force of my argument but remained dubious"
Derived form noun dubiousness₁

OXFORD DICTIONARY

THESAURUS

dubious

Humean, Pyrrhonic, a bit thick, a bit thin, absurd, agnostic, ambitendent, ambivalent, amoral, arguable, at issue, at loose ends, beguiling, beyond belief, capricious, catchy, changeable, confutable, conjectural, conscienceless, contestable, controversial, controvertible, corrupt, corrupted, criminal, crooked, dark, debatable, deceiving, deceptive, delusive, delusory, deniable, devious, dishonest, dishonorable, disinclined, disputable, distrustful, double-minded, doubtable, doubtful, doubting, dubitable, equivocal, evasive, fallacious, false, felonious, fence-sitting, fence-straddling, fickle, fishy, fly-by-night, fraudulent, from Missouri, hallucinatory, hard of belief, hard to believe, hardly possible, hesitant, iffy, ill-got, ill-gotten, illusive, illusory, immoral, implausible, improbable, in dispute, in doubt, in dubio, in question, inconceivable, incredible, incredulous, indecisive, indirect, infirm of purpose, insecure, insidious, irresolute, irresolved, leery, mercurial, misleading, mistakable, mistrustful, mistrusting, moot, more than doubtful, mugwumpian, mugwumpish, mutable, not deserving belief, not kosher, of two minds, open, open to doubt, open to question, open to suspicion, passing belief, preposterous, problematic, questionable, questioning, refutable, reluctant, ridiculous, rocky, rotten, scrupulous, shady, shaky, shameless, shifty, shy, sinister, skeptic, skeptical, slippery, speculative, staggering belief, suppositional, suspect, suspecting, suspicious, tall, thick, thin, tottery, treacherous, trickish, tricksy, tricky, trustless, unbelievable, uncertain, unclear, unconscienced, unconscientious, unconscionable, unconvincing, undecided, undependable, underhand, underhanded, undetermined, unearthly, unethical, ungodly, unhealthy, unimaginable, unlikely, unpredictable, unprincipled, unpromising, unreliable, unresolved, unsafe, unsavory, unscrupulous, unsettled, unsound, unstable, unsteady, unstraightforward, unsure, unthinkable, untrusting, untrustworthy, untrusty, unworthy of belief, wary, without remorse, without shame

ROGET THESAURUS

dubious

Uncertainty

N uncertainty, incertitude, doubt, doubtfulness, dubiety, dubitation, dubitancy, dubitousness, hesitation, suspense, perplexity, embarrassment, dilemma, bewilderment, timidity, vacillation, diaporesis, indetermination, vagueness, haze, fog, obscurity, ambiguity, contingency, dependence, dependency, double contingency, possibility upon a possibility, open question, onus probandi, blind bargain, pig in a poke, leap in the dark, something or other, needle in a haystack, needle in a bottle of hay, roving commission, precariousness, fallibility, uncertain, casual, random, changeable, doubtful, dubious, indecisive, unsettled, undecided, undetermined, in suspense, open to discussion, controvertible, in question, vague, indeterminate, indefinite, ambiguous, equivocal, undefined, undefinable, confused, mystic, oracular, dazed, perplexing, enigmatic, paradoxical, apocryphal, problematical, hypothetical, experimental, unpredictable, unforeseeable (unknowable), fallible, questionable, precarious, slippery, ticklish, debatable, disputable, unreliable, untrustworthy, contingent, contingent on, dependent on, subject to, dependent on circumstances, occasional, provisional, unauthentic, unauthenticated, unauthoritative, unascertained, unconfirmed, undemonstrated, untold, uncounted, in a state of uncertainty, in a cloud, in a maze, bushed, off the track, ignorant, afraid to say, out of one's reckoning, astray, adrift, at sea, at fault, at a loss, at one's wit's end, at a nonplus, puzzled, lost, abroad, d_esorient_e, distracted, distraught, pendente lite, sub spe rati, Heaven knows, who can tell? who shall decide when doctors disagr.

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