Different from is generally regarded as the most acceptable collocation; to is common in less formal use; than is established in US use and also found in British use, esp. when followed by a clause, e.g. I am a different person than I was a year ago.
2 distinct, separate; not the same one (as another).
3 colloq. unusual (wanted to do something different).

Derivative

differently adv. differentness n.

Etymology

ME f. OF different f. L different- (as DIFFER)

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THESAURUS

different

aberrant, abnormal, absolute, abundant, amorphous, anomalistic, anomalous, another, assorted, at odds, at variance, bizarre, capricious, certain, changeable, changing, choppy, concrete, conflicting, contrary, contrasted, contrasting, contrastive, counter, crank, crankish, cranky, crotchety, defined, definite, departing, detailed, determinate, deviant, deviating, deviative, deviatory, differentiated, differing, disaccordant, disagreeing, discordant, discrepant, discrete, discriminated, disjoined, disorderly, disparate, dissimilar, dissonant, distant, distinct, distinctive, distinguishable, distinguished, divaricate, divergent, diverging, divers, diverse, diversified, diversiform, dotty, eccentric, erose, erratic, esoteric, especial, exceptional, express, extraordinary, fey, fixed, flaky, formless, freakish, funny, hardly like, heteroclite, heterogeneous, heteromorphic, idiocratic, idiosyncratic, impulsive, in disagreement, inaccordant, incompatible, incongruous, inconsistent, inconsonant, inconstant, individual, inharmonious, inner, intimate, irreconcilable, irregular, jagged, jerky, kinky, kooky, maggoty, manifold, many, mercurial, minute, motley, multifarious, mutable, new, nonconformist, nonstandard, nonuniform, noteworthy, novel, numerous, nutty, odd, oddball, off, offbeat, opposite, original, other, otherwise, out, particular, peculiar, personal, pluralistic, poles apart, poles asunder, precise, private, queer, quirky, ragged, rare, remarkable, respective, rough, scarcely like, screwball, screwy, separate, separated, several, shapeless, single, singular, solipsistic, spasmodic, special, specific, sporadic, strange, stray, straying, subnormal, sundry, twisted, unalike, uncommon, unconformable, unconventional, unequable, unequal, uneven, unfamiliar, unheard-of, unidentical, unique, unlike, unmatched, unnatural, unorthodox, unresembling, unsame, unsimilar, unstable, unsteady, unsystematic, ununiform, unusual, variable, variant, varied, variegated, variform, various, varying, wacky, wandering, wavering, weird, whimsical, widely apart, worlds apart

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ROGET THESAURUS

different

Difference

N difference, variance, variation, variety, diversity, dissimilarity, disagreement, disparity, distinction, contradistinction, alteration, modification, permutation, moods and tenses, nice distinction, fine distinction, delicate distinction, subtle distinction, shade of difference, nuance, discrimination, differentia, different thing, something else, apple off another tree, another pair of shoes, horse of a different color, this that or the other, differing, different, diverse, heterogeneous, multifarious, polyglot, distinguishable, dissimilar, varied, modified, diversified, various, divers, all manner of, all kinds of, variform, daedal, other, another, not the same, unequal, unmatched, widely apart, poles apart, distinctive, characteristic, discriminative, distinguishing, incommensurable, incommensurate, differently, il y a fagots et fagots.

Multiformity

N multiformity, omniformity, variety, diversity, multifariousness, varied assortment, dissimilarity, polymorphous, multiform, multifold, multifarious, multigenerous, multiplex, heterogeneous, diversified, dissimilar, various, varied, variform, manifold, many-sided, variegated, motley, mosaic, epicene, indiscriminate, desultory, irregular, mixed, different, assorted, mingled, odd, diverse, divers, all manner of, of every description, of all sorts and kinds, et hoc genus omne, and what not? de omnibus rebus et quibusdam aliis, jumbled, confused, mixed up, discordant, inharmonious, unmatched, unrelated, nonuniform, omniform, omnigenous, omnifarious, protean (form), harmoniously confused, variety's the very spice of life.

Incomparability

N incomparability, incommensurability, indistinguishablility, incommensurable, incommensurate, incomparable, different, like apples and oranges, no basis for comparison, no standard for comparison.

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