n.
Function: noun
Etymology: Middle English; akin to Middle Low German mol
Date: 14th century
1 : any of numerous burrowing insectivores (esp. family Talpidae) with tiny eyes, concealed ears, and soft fur
2 : one who works in the dark
3 : a machine for tunneling
4 : a spy (as a double agent) who establishes a cover long before beginning espionage broadly : one within an organization who passes on information