vanilla

(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.

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

(noun) a distinctive fragrant flavor characteristic of vanilla beans.

(adj) flavored with vanilla extract. Examples: "He liked vanilla ice cream."

(adj) plain and without any extras or adornments. Examples: "The most common type of bond is the straight or plain vanilla bond." "The basic car is known as the vanilla version."