Entry 1 sense Webster, 1913 womanizer /wo͝om'-ən-īzˌ-ẽr/ · wom·an·i·zer · IPA /ˈwʊm.əˌnaɪ.zəɹ/ 01 n. One who womanizes; a philanderer. 1. One who womanizes; a philanderer.