Entry 1 sense Webster, 1913 Masted /măs'-təd/ · Mast·ed · IPA /mˈæstəd/ 01 a. Furnished with a mast or masts; -- chiefly in composition; as, a three-masted schooner. 1. Furnished with a mast or masts; -- chiefly in composition; as, a three-masted schooner.