Mole definition

noun

(1) Small velvety-furred burrowing mammal having small eyes and fossorial forefeet

(2) A protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away

(3) A small congenital pigmented spot on the skin

(4) Spicy sauce often containing chocolate

(5) A spy who works against enemy espionage

(6) The molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the Systeme International d'Unites