Search Result for "stepbrother": 
Wordnet 3.0

NOUN (1)

1. a brother who has only one parent in common with you;
[syn: stepbrother, half-brother, half brother]



The Collaborative International Dictionary of English v.0.48:

Stepbrother \Step"broth`er\, n.
   A brother by the marriage of one's father with the mother of
   another, or of one's mother with the father of another.
   [1913 Webster]


WordNet (r) 3.0 (2006):

stepbrother
    n 1: a brother who has only one parent in common with you [syn:
         stepbrother, half-brother, half brother]