GNU Collaborative International Dictionary of English

Found one definition

1.       
   Beau (bō), n.; pl. F. Beaux (E. pron. bōz), E. Beaus (bōz). [F., a fop, fr. beau fine, beautiful, fr. L. bellus pretty, fine, for bonulus, dim. of bonus good. See Bounty, and cf. Belle, Beauty.]
   1. A man who takes great care to dress in the latest fashion; a dandy.
   
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   2. A man who escorts, or pays attentions to, a lady; an escort; a suitor or lover.
   
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