Source : Webster's Revised Unabridged Dictionary (1913)

Tribe \Tribe\, v. t.
   To distribute into tribes or classes. [R.]

         Our fowl, fish, and quadruped are well tribed. --Abp.
                                                  Nicolson.

Tribe \Tribe\, n. [L. tribus, originally, a third part of the
   Roman people, afterwards, a division of the people, a tribe;
   of uncertain origin: cf. F. tribu.]
   1. A family, race, or series of generations, descending from
      the same progenitor, and kept distinct, as in the case of
      the twelve tribes of Israel, descended from the twelve
      sons of Jacob. ``The Lion of the tribe of Juda.'' --Rev.
      v. 5.

            A wealthy Hebrew of my tribe.         --Shak.

   2. (Bot.) A number of species or genera having certain
      structural characteristics in common; as, a tribe of
      plants; a tribe of animals.

   Note: By many recent naturalists, tribe has been used for a
         group of animals or plants intermediate between order
         and genus.

Source : WordNet®

tribe
     n 1: a social division of (usually preliterate) people [syn: {folk}]
     2: a federation (as of American Indians) [syn: {federation of
        tribes}]
     3: (biology) a taxonomic category between a genus and a
        subfamily
     4: group of people related by blood or marriage [syn: {kin}, {kin
        group}, {kinship group}, {kindred}, {clan}]