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

complimentary \com`plimen"tary\, a.
   expressive of regard or praise; of the nature of, or
   containing, a compliment; as, a complimentary remark; a
   complimentary ticket. "complimentary addresses." --prescott.
   1913 webster

[2] : WordNet (r) 2.0

complimentary
     adj 1: conveying or resembling a compliment; "a complimentary
            remark" ant: uncomplimentary
     2: costing nothing; "complimentary tickets" syn: costless, free,
         gratisp, gratuitous
see also:
uncomplimentary costless free gratisp gratuitous 

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

73 moby thesaurus words for "complimentary":
   acclamatory, admiring, adulatory, appreciative, approbatory, bland,
   blandishing, blarneying, buttery, cajoling, charitable,
   commendatory, congratulational, congratulatory, costless,
   courtierly, courtly, eleemosynary, encomiastic, eulogistic,
   expenseless, fair-spoken, fawning, fine-spoken, flattering,
   for free, for love, for nothing, free, free as air,
   free for nothing, free gratis, free of charge, free of cost,
   freebie, fulsome, giftlike, given, gratis, gratuitous, gratulant,
   gratulatory, gushing, honey-mouthed, honey-tongued, honeyed,
   insincere, insinuating, laudatory, mealymouthed, obsequious, oily,
   oily-tongued, on the house, panegyric, panegyrical, regardful,
   respectful, slimy, slobbery, smarmy, smooth, smooth-spoken,
   smooth-tongued, soapy, soft-soaping, sycophantic, unbought,
   unctuous, unpaid-for, untaxed, wheedling, without charge

Complimentary >> C Words
Complimentary, definition of term: Complimentary
complimentary_pag1.html