The Collaborative International Dictionary of English v.0.48:

Celibate \Cel"i*bate\, n. [L. aelibatus, fr. caelebs unmarried,
   single.]
   1. Celibate state; celibacy. [Obs.]
      [1913 Webster]

            He . . . preferreth holy celibate before the estate
            of marriage.                          --Jer. Taylor.
      [1913 Webster]

   2. One who is unmarried, esp. a bachelor, or one bound by
      vows not to marry.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Celibate \Cel"i*bate\, a.
   Unmarried; single; as, a celibate state.
   [1913 Webster]

WordNet (r) 3.0 (2006):

celibate
    adj 1: abstaining from sexual intercourse; "celibate priests"
           [syn: celibate, continent]
    n 1: an unmarried person who has taken a religious vow of
         chastity

Moby Thesaurus II by Grady Ward, 1.0:

126 Moby Thesaurus words for "celibate":
   Apostolic, Encratic, Lenten, Platonic, Pythagorean, Rechabite,
   Shaker, Spartan, Stoic, abbacomes, abbot, absolute, abstemious,
   abstinent, acarpous, alone, arid, ascetic, azygous, bachelor,
   barren, beadsman, brother, caloyer, celibataire, cenobite, chaste,
   childless, continent, conventual, conventual prior, desert,
   desolate, drained, dried-up, dry, exhausted, fallow,
   first and last, friar, fruitarian, fruitless, gaunt, gelded,
   grand prior, hermit, hieromonach, immaculate, impair, impotent,
   ineffectual, infecund, infertile, intact, issueless, jejune,
   lay abbot, lay brother, leached, lone, maidenly, mendicant,
   menopausal, misogamic, misogamist, misogynist, misogynous,
   monachal, monastic, monk, monkish, nephalistic, nonfertile,
   nonproducing, nonproductive, nonprolific, nun, odd, on the wagon,
   one and only, only, only-begotten, palmer, pilgrim, pillar saint,
   pillarist, priest, prior, pure, religieux, religious,
   sexually abstinent, sine prole, single, singular, sole, spinster,
   sterile, stylite, sucked dry, sworn off, teemless, teetotal,
   uncultivated, undefiled, unfertile, unfruitful, unique, unmarried,
   unpaired, unplowed, unproductive, unprolific, unrepeated, unsown,
   unsullied, untilled, unwed, vegetarian, vestal, virgin, virginal,
   virtuous, waste, wasted, without issue