Entry 1 sense Webster, 1913 Marauder /mẽr-ôd'-ẽr/ · Ma·raud·er · IPA /məˈɹɔdɚ/ 01 n. A rover in quest of booty or plunder; a plunderer; one who pillages. 1. A rover in quest of booty or plunder; a plunderer; one who pillages.