un·like / ˌənˈlīk/ • prep. different from; not similar to: they were unlike anything ever seen before a large house not unlike Mr. Shaw's. ∎ in contrast to; differently from: unlike Helen, he was not superstitious. ∎ uncharacteristic of (someone): he sounded irritable, which was unlike him.• adj. dissimilar or different from each other: they seemed utterly unlike, despite being twins. ∎ (unlike to/from) archaic not like; different from: he was very unlike to any other man.DERIVATIVES: un·like·ness n.