The Collaborative International Dictionary of English v.0.48:

Comrade \Com"rade\ (? or ?; 277), n. [Sp. camarada, fr. L.
   camara, a chamber; hence, a chamber-fellowship, and then a
   chamber-fellow: cf. F. camarade. Cf. Chamber.]
   A mate, companion, or associate.
   [1913 Webster]

         And turned my flying comrades to the charge. --J.
                                                  Baillie.
   [1913 Webster]

         I abjure all roofs, and choose . . .
         To be a comrade with the wolf and owl.   --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

comrade
    n 1: a friend who is frequently in the company of another;
         "drinking companions"; "comrades in arms" [syn:
         companion, comrade, fellow, familiar, associate]
    2: a fellow member of the Communist Party
    3: used as a term of address for those male persons engaged in
       the same movement; "Greetings, comrade!" [syn: brother,
       comrade]