[1] : The Collaborative International Dictionary of English v.0.48

abstainer \abstain"er\, n.
   one who abstains; esp., one who abstains from the use of
   intoxicating liquors.
   1913 webster

[2] : WordNet (r) 2.0

abstainer
     n 1: practices self denial as spiritual discipline syn: ascetic
     2: a person who refrains from drinking intoxicating beverages
        syn: abstinent, nondrinker ant: drinker
see also:
ascetic abstinent nondrinker drinker 

[3] : Moby Thesaurus II by Grady Ward, 1.0

34 moby thesaurus words for "abstainer":
   albigensian, apostolici, catharist, encratite, franciscan,
   pythagorean, pythagorist, rechabite, sabbatarian, shaker, trappist,
   waldensian, abstinent, anchorite, ascetic, banian, bhikshu,
   dervish, fakir, flagellant, fruitarian, gymnosophist, hermit,
   hydropot, mendicant, nephalist, puritan, sannyasi, teetotaler,
   teetotalist, vegetarian, water-drinker, yogi, yogin

[4] : THE DEVIL'S DICTIONARY ((C)1911 Released April 15 1993)

abstainer, n.  a weak person who yields to the temptation of denying
himself a pleasure.  a total abstainer is one who abstains from
everything but abstention, and especially from inactivity in the
affairs of others.

    said a man to a crapulent youth:  "i thought
        you a total abstainer, my son."
    "so i am, so i am," said the scrapgrace caught --
        "but not, sir, a bigoted one."
                                                                  g.j.

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