The Collaborative International Dictionary of English v.0.48:

Meditative \Med"i*ta*tive\, a. [L. meditativus: cf. F.
   m['e]ditatif.]
   Disposed to meditate, or to meditation; as, a meditative man;
   a meditative mood. -- Med"i*ta*tive*ly, adv. --
   Med"i*ta*tive*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

meditative
    adj 1: deeply or seriously thoughtful; "Byron lives on not only
           in his poetry, but also in his creation of the 'Byronic
           hero' - the persona of a brooding melancholy young man";
           [syn: brooding, broody, contemplative,
           meditative, musing, pensive, pondering,
           reflective, ruminative]

Moby Thesaurus II by Grady Ward, 1.0:

121 Moby Thesaurus words for "meditative":
   absent, absentminded, absorbed, absorbed in, abstracted, bemused,
   brooding, buried in, castle-building, caught up in, cogitative,
   cognitive, concentrating, concentrative, conceptive, conceptual,
   conceptualized, contemplating, contemplative, daydreaming,
   daydreamy, deliberating, deliberative, devoted, devoted to,
   do-nothing, dormant, dreaming, dreamy, drowsing, ecstatic,
   elsewhere, engaged, engrossed, engrossed in, excogitating,
   excogitative, faraway, half-awake, ideative, idle, immersed in,
   immobile, in a reverie, in the clouds, inactive, inert, intent,
   intent on, introspective, involved, laissez-aller, laissez-faire,
   lost, lost in, lost in thought, meditating, mental, monomaniacal,
   monopolized, mooning, moonraking, motionless, museful, musing,
   napping, neuter, neutral, nodding, noetic, oblivious, obsessed,
   occupied, paralytic, paralyzed, passive, pensive, pipe-dreaming,
   pondering, prehensive, preoccupied, procrastinating, quiescent,
   quietist, quietistic, rapt, reflecting, reflective, ruminant,
   ruminating, ruminative, serious, single-minded, sober,
   somewhere else, speculative, stagnant, stagnating, standpat,
   stargazing, static, stationary, studious, studying, submerged in,
   swept up, taken up, taken up with, thinking, thought, thoughtful,
   totally absorbed, transported, unconscious, vegetable, vegetative,
   wistful, woolgathering, wrapped in, wrapped in thought,
   wrapped up in