mole mole /ˈmoʊl/

noun

1. Small velvety-furred burrowing mammal having small eyes and fossorial forefeet  ( mole )
   small velvety-furred burrowing mammal having small eyes and fossorial forefeet
    While gardening, I discovered a mole burrow, indicative of the mammal's presence in my yard.
   While gardening, I discovered a mole burrow, indicative of the mammal's presence in my yard.
   
   
2. A protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away  ( bulwark , groin , groyne , breakwater , jetty , mole , seawall )
   a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
    The jetty was badly damaged in the storm, and had to be rebuilt
   The jetty was badly damaged in the storm, and had to be rebuilt
   
   
3. A small congenital pigmented spot on the skin  ( mole )
   a small congenital pigmented spot on the skin
    He had a mole on his neck that was easily visible
   He had a mole on his neck that was easily visible
   
   
4. Spicy sauce often containing chocolate  ( mole )
   spicy sauce often containing chocolate
    The chicken was smothered in a rich mole sauce.
   The chicken was smothered in a rich mole sauce.
   
   
5. A spy who works against enemy espionage  ( counterspy , mole )
   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 Système International d'Unités  ( gram molecule , mol , mole )
   the molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the Système International d'Unités