The Collaborative International Dictionary of English v.0.48:

Unique \U*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*nique"ly, adv. -- U*nique"ness, n.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Unique \U*nique"\, n.
   A thing without a like; something unequaled or unparalleled.
   [R.]
   [1913 Webster]

         The phenix, the unique pf birds.         --De Quincey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

unique
    adj 1: radically distinctive and without equal; "he is alone in
           the field of microbiology"; "this theory is altogether
           alone in its penetration of the problem"; "Bach was
           unique in his handling of counterpoint"; "craftsmen whose
           skill is unequaled"; "unparalleled athletic ability"; "a
           breakdown of law unparalleled in our history" [syn:
           alone(p), unique, unequaled, unequalled,
           unparalleled]
    2: (followed by `to') applying exclusively to a given category
       or condition or locality; "a species unique to Australia"
    3: the single one of its kind; "a singular example"; "the unique
       existing example of Donne's handwriting"; "a unique copy of
       an ancient manuscript"; "certain types of problems have
       unique solutions" [syn: singular, unique]
    4: highly unusual or rare but not the single instance; "spoke
       with a unique accent"; "had unique ability in raising funds";
       "a frankness unique in literature"; "a unique dining
       experience"

Moby Thesaurus II by Grady Ward, 1.0:

158 Moby Thesaurus words for "unique":
   a certain, absolute, almost unheard-of, alone, an, another, any,
   any one, appropriate, atomic, authentic, avant-garde, azygous,
   beguiling, bewildering, beyond compare, beyond comparison,
   breakaway, celibate, characteristic, creative, different,
   distinctive, distinguished, easily first, either, else, enigmatic,
   exceptional, exclusive, extraordinary, fabulous, facile princeps,
   fantastic, fascinating, first and last, firsthand, fresh,
   idiocratic, idiosyncratic, imaginative, immortal, impair,
   in character, incomparable, incomprehensible, inconceivable,
   incredible, individual, indivisible, infrequent, inimitable,
   integral, intrinsic, invincible, irreducible, lone, marked,
   marvelous, matchless, miraculous, monadic, monistic, new,
   not that sort, not the same, not the type, novel, nulli secundus,
   odd, of a sort, of another sort, of sorts, offbeat, one,
   one and only, only, only-begotten, original, other, other than,
   otherwise, outlandish, particular, passing strange, peculiar,
   peerless, phenomenal, prodigious, proper, puzzling, quintessential,
   rare, recherche, remarkable, revolutionary, scarce, second to none,
   seldom met with, seldom seen, sensational, separate, simple,
   single, singular, slow, sole, solid, solitary, solo, sparse,
   special, strange, striking, stupendous, sui generis, true to form,
   unanalyzable, unapproachable, unapproached, unbeatable, uncommon,
   uncustomary, underived, undivided, undreamed-of, unequaled,
   unexampled, unexcelled, unexpected, unfamiliar, unfrequent,
   unheard-of, uniform, unimaginable, unitary, unmatchable, unmatched,
   unordinary, unpaired, unparagoned, unparalleled, unpeered,
   unprecedented, unrepeatable, unrepeated, unrivaled, unsurpassable,
   unsurpassed, unthinkable, unthought-of, unusual, unwonted, whole,
   without equal, without parallel, wonderful, wondrous



The Free On-line Dictionary of Computing (30 December 2018):

UNIQUE

    A portable job control language.

   ["The UNIQUE Command Language - Portable Job Control",
   I.A. Newman, Proc DATAFAIR 73, 1973, pp. 353-357].

   (1994-11-22)