b home Zachary Ayotte bat [bat] –noun 1. any of numerous flying mammals of the order Chiroptera, of worldwide distribution in tropical and temperate regions, having modified forelimbs that serve as wings and are covered with a membranous skin extending to the hind limbs. a b c d e f g h i j k l m n o p q r s t u v w x y z back basket balloon bat bamboo banana band basketball bathroom baton be-bin bath bag