Definition of "Vanilla" :

noun: a distinctive fragrant flavor characteristic of vanilla beans

noun: a flavoring prepared from vanilla beans macerated in alcohol (or imitating vanilla beans)

noun: 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

adjective: plain and without any extras or adornments

"The most common type of bond is the straight or plain vanilla bond."

adjective: flavored with vanilla extract

"He liked vanilla ice cream."