Source : Webster's Revised Unabridged Dictionary (1913)

Philander \Phi*lan"der\, n.
   A lover. [R.] --Congreve.

Philander \Phi*lan"der\, n. (Zo["o]l.)
   (a) A South American opossum ({Didelphys philander}).
   (b) An Australian bandicoot ({Perameles lagotis}).

Philander \Phi*lan"der\, v. i. [Gr. ? fond of men; ? loving + ?
   man.]
   To make love to women; to play the male flirt.

         You can't go philandering after her again. --G. Eliot.

Source : WordNet®

philander
     v 1: have amorous affairs; of men; "He has been womanizing for
          years" [syn: {womanize}, {womanise}]
     2: talk or behave amorously, without serious intentions; "The
        guys always try to chat up the new secretaries"; "My
        husband never flirts with other women" [syn: {chat up}, {flirt},
         {dally}, {butterfly}, {coquet}, {coquette}, {romance}, {mash}]