Search Result for "stepfather": 
Wordnet 3.0

NOUN (1)

1. the husband of your mother by a subsequent marriage; 



The Collaborative International Dictionary of English v.0.48:

Stepfather \Step"fa`ther\, n. [AS. ste['o]pfaeder.]
   The husband of one's mother by a subsequent marriage.
   [1913 Webster]


WordNet (r) 3.0 (2006):

stepfather
    n 1: the husband of your mother by a subsequent marriage