a small mammal that is almost blind, has dark fur, and lives in passages that it digs underground

a small, dark spot or lump (= raised area) on a person's skin

a person who works for an organization or government and secretly gives information to its competitor or enemy

A mole inside the Department had leaked secret proposals to the press. 该部门的一名内部人士向媒体泄露了秘密计划。

Compare: spy noun

a unit of measurement of the amount of a substance expressed in grams