The Collaborative International Dictionary of English v.0.48:

29 \29\ adj.
   1. denoting a quantity consisting of twenty-nine items or
      units; -- representing the number twenty-nine as Arabic
      numerals

   Syn: twenty-nine, xxix
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

29
    adj 1: being nine more than twenty [syn: twenty-nine, 29,
           xxix]
    n 1: the cardinal number that is the sum of twenty-eight and one
         [syn: twenty-nine, 29, XXIX]