The Collaborative International Dictionary of English v.0.48:

Anthropology \An`thro*pol"o*gy\, n. [Gr. 'a`nqrwpos man +
   -logy.]
   1. The science of the structure and functions of the human
      body.
      [1913 Webster]

   2. The science of man, including the study of the ditribution
      of physical and cultural attributes in relation to man's
      origin, location, history, and environment; -- sometimes
      used in a limited sense to mean the study of man as an
      object of natural history, or as an animal.
      [1913 Webster +PJC]

   3. That manner of expression by which the inspired writers
      attribute human parts and passions to God. See also
      anthropopathite, anthropopathism, anthropomorphist.
      [1913 Webster]

WordNet (r) 3.0 (2006):

anthropology
    n 1: the social science that studies the origins and social
         relationships of human beings