Incongruous \In*con"gru*ous\, a. [L. incongruus. See In- not, and Congruous.]

Not congruous; reciprocally disagreeing; not capable of harmonizing or readily assimilating; inharmonious; inappropriate; unsuitable; not fitting; inconsistent; improper; as, an incongruous remark; incongruous behavior, action, dress, etc. "Incongruous mixtures of opinions." --I. Taylor. "Made up of incongruous parts." --Macaulay. [1913 Webster]

Incongruous denotes that kind of absence of harmony or suitableness of which the taste and experience of men takes cognizance. --C. J. Smith. [1913 Webster]

Incongruous numbers (Arith.), two numbers, which, with respect to a third, are such that their difference can not be divided by it without a remainder, the two numbers being said to be incongruous with respect to the third; as, twenty and twenty-five are incongruous with respect to four.

Syn: Inconsistent; unsuitable; inharmonious; disagreeing; absurd; inappropriate; unfit; improper. See Inconsistent. -- In*con"gru*ous*ly, adv. -- In*con"gru*ous*ness, n. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

158 Moby Thesaurus words for "incongruous": abnormal, absonant, absurd, amusing, anomalous, assorted, at odds, at variance, bad, bizarre, clashing, colliding, conflicting, contradictory, contrary, contrary to reason, contrasted, contrasting, departing, deviating, deviative, different, differentiated, differing, disaccordant, disagreeing, disconsonant, discordant, discrepant, discrete, discriminated, disharmonious, disjoined, disparate, disproportionate, dissimilar, dissonant, distinct, distinguished, divergent, diverging, divers, diverse, diversified, droll, eccentric, fallacious, faulty, flawed, funny, futile, harsh, heterogeneous, hilarious, humorous, ill-advised, ill-considered, ill-suited, ill-timed, illogical, impolitic, improper, in disagreement, inaccordant, inadvisable, inappropriate, inapt, inauthentic, incoherent, incommensurable, incommensurate, incompatible, inconclusive, incongruent, inconsequent, inconsequential, inconsistent, inconsonant, inept, inexpedient, infelicitous, inharmonious, inopportune, invalid, irrational, irreconcilable, laughable, loose, ludicrous, mal a propos, malapropos, many, motley, multifarious, nonscientific, not following, off-color, off-tone, out of keeping, out of line, out of place, out of proportion, out of step, oxymoronic, paradoxical, paralogical, poles apart, poles asunder, priceless, quaint, quizzical, reasonless, rich, ridiculous, risible, screaming, self-annulling, self-contradictory, self-refuting, senseless, separate, separated, several, unapt, unauthentic, unbecoming, unbefitting, unconformable, unconnected, undesirable, unequal, unfit, unfitting, unfortunate, unhappy, unlike, unmeet, unphilosophical, unprofitable, unreasonable, unscientific, unseasonable, unseemly, unsuitable, unsuited, untimely, unwise, variant, varied, variegated, various, varying, whimsical, widely apart, without reason, witty, worlds apart, wrong

Source: Moby Thesaurus II by Grady Ward, 1.0
 

incongruous adj : lacking in harmony or compatibility or appropriateness; "a plan incongruous with reason"; "incongruous behavior"; "a joke that was incongruous with polite conversation" [ant: congruous]

Source: WordNet (r) 2.0
 

Incongruous \In*con"gru*ous\, a. [L. incongruus. See In- not, and Congruous.]

Not congruous; reciprocally disagreeing; not capable of harmonizing or readily assimilating; inharmonious; inappropriate; unsuitable; not fitting; inconsistent; improper; as, an incongruous remark; incongruous behavior, action, dress, etc. ``Incongruous mixtures of opinions.'' --I. Taylor. ``Made up of incongruous parts.'' --Macaulay.

Incongruous denotes that kind of absence of harmony or suitableness of which the taste and experience of men takes cognizance. --C. J. Smith.

Incongruous numbers (Arith.), two numbers, which, with respect to a third, are such that their difference can not be divided by it without a remainder, the two numbers being said to be incongruous with respect to the third; as, twenty-five are incongruous with respect to four.

Syn: Inconsistent; unsuitable; inharmonious; disagreeing; absurd; inappropriate; unfit; improper. See Inconsistent. -- In*con"gru*ous*ly, adv. -- In*con"gru*ous*ness, n.

Source: Webster's Revised Unabridged Dictionary (1913)