The Collaborative International Dictionary of English v.0.48:

Subsume \Sub*sume"\, v. t. [Pref. sub- + L. sumere to take.]
   To take up into or under, as individual under species,
   species under genus, or particular under universal; to place
   (any one cognition) under another as belonging to it; to
   include under something else.
   [1913 Webster]

         To subsume one proposition under another. --De Quincey.
   [1913 Webster]

         A principle under which one might subsume men's most
         strenuous efforts after righteousness.   --W. Pater.
   [1913 Webster]

WordNet (r) 3.0 (2006):

subsume
    v 1: contain or include; "This new system subsumes the old one"
    2: consider (an instance of something) as part of a general rule
       or principle [syn: subsume, colligate]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "subsume":
   affect, assume, bring, call for, comprehend, comprise, contain,
   embody, embrace, encompass, entail, have, implicate, imply,
   involve, lead to, presume, presuppose, require, take, take in