Source : Webster's Revised Unabridged Dictionary (1913)

Maverick \Mav"er*ick\, v. t.
   To take a maverick. [Western U. S.]

Maverick \Mav"er*ick\, n.
   In the southwestern part of the united States, a bullock or
   heifer that has not been branded, and is unclaimed or wild;
   -- said to be from Maverick, the name of a cattle owner in
   Texas who neglected to brand his cattle.

Source : WordNet®

maverick
     adj : independent in behavior or thought; "she led a somewhat
           irregular private life"; "maverick politicians" [syn: {irregular},
            {unorthodox}]
     n 1: someone who exhibits great independence in thought and
          action [syn: {rebel}]
     2: an unbranded range animal (especially a stray calf); belongs
        to the first person who puts a brand on it