1. singular, matchless, unequaled, rare. uniqueu*nique , a. [f. unique; cf. it. unico; from l. unicus, from unus one. see: one.] being without a like or equal; unmatched; unequaled; unparalleled; single in kind or excellence; sole. -- u*niquely , adv. -- u*niqueness , n.unique u*nique, n. a thing without a like; something unequaled or unparalleled. [r.] the phenix, the unique pf birds.unique adj