vanilla -- (any of numerous climbing plants of the genus Vanilla having fleshy leaves and clusters of large waxy highly fragrant white or green or topaz flowers)
vanilla, vanilla extract -- (a flavoring prepared from vanilla beans macerated in alcohol (or imitating vanilla beans))
vanilla -- (a distinctive fragrant flavor characteristic of vanilla beans)
vanilla -- (plain and without any extras or adornments; "the most common type of bond is the straight or plain vanilla bond"; "the basic car is known as the vanilla version")