The Collaborative International Dictionary of English v.0.48:

Applicable \Ap"pli*ca*ble\, a. [Cf. F. aplicable, fr. L.
   applicare. See Apply.]
   Capable of being applied; fit or suitable to be applied;
   having relevance; as, this observation is applicable to the
   case under consideration. -- Ap"pli*ca*ble*ness, n. --
   Ap"pli*ca*bly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

applicable
    adj 1: capable of being applied; having relevance; "gave
           applicable examples to support her argument"