'Stepdaughter' definitions:

Definition of 'stepdaughter'

(from WordNet)
noun
A daughter of your spouse by a former marriage

Definition of 'Stepdaughter'

From: GCIDE
  • Stepdaughter \Step"daugh`ter\, n. [AS. ste['o]pdohtor.] A daughter of one's wife or husband by a former marriage. [1913 Webster]