Real Dictionary

banana
variable noun: Bananas are long curved fruit with yellow skins.

banana in American English
any of a genus (Musa) of treelike tropical plants of the banana family, with long, broad leaves and large clusters of edible fruit; esp., any of the various hybrids widely cultivated in the Western Hemisphere
designating a family (Musaceae, order Zingiberales) of monocotyledonous tropical plants, including heliconia and bird of paradise
noun: a tropical plant of the genus Musa, certain species of which are cultivated for their nutritious fruit

banana in British English
noun: any of several tropical and subtropical herbaceous treelike plants of the musaceous genus Musa, esp M. sapientum, a widely cultivated species propagated from suckers and having hanging clusters of edible fruit

banana in Hospitality
noun: Bananas are long curved fruit with yellow skins.