GNU Collaborative International Dictionary of English

Found one definition

1.       
   Advantage, v. t. [imp. & p. p. Advantaged ; p. pr. & vb. n. Advantaging .] [F. avantager, fr. avantage. See Advance.] To give an advantage to; to further; to promote; to benefit; to profit.
   1913 Webster
   The truth is, the archbishop's own stiffness and averseness to comply with the court designs, advantaged his adversaries against him.
   Fuller.
   
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   What is a man advantaged, if he gain the whole world, and lose himself, or be cast away?
   Luke ix. 25.
   
   1913 Webster
   To advantage one's self of, to avail one's self of. [Obs.]
   1913 Webster