Real Dictionary

mole
countable noun: A mole is a member of a government or other organization who gives secret information to the press or to a rival organization.
countable noun: A mole is a natural dark spot or small dark lump on someone's skin.
countable noun: A mole is a small animal with black fur that lives underground.

mole in American English 1
a small, congenital spot on the human skin, usually dark-colored and slightly raised, often hairy
noun: any of various small insectivorous mammals, esp. of the family Talpidae, living chiefly underground, and having velvety fur, very small eyes, and strong forefeet

mole in American English 2
any of various small, burrowing insectivores (esp. family Talpidae) with small eyes and ears, shovel-like forefeet, and soft fur: moles live mainly underground
noun: a small, congenital spot or blemish on the human skin, usually of a dark color, slightly elevated, and sometimes hairy; nevus

mole in American English 3
a barrier of stone, etc. built in the water to protect from the force of the waves, as a breakwater
noun: a massive structure, esp. of stone, set up in the water, as for a breakwater or a pier

mole in American English 4
the quantity of a chemical substance having a weight in grams numerically equal to its molecular weight: one mole of a substance contains 6.022137 × 1023 molecules
noun: the molecular weight of a substance expressed in grams; gram molecule

mole in American English 5
a marked growth of grapelike masses of fetal placental tissue
noun: a fleshy mass in the uterus formed by a hemorrhagic dead ovum

mole in American English 6
any of various spicy Mexican sauces for meat or poultry, typically made with chilies, tomatoes, spices, and ground nuts; esp., such a sauce containing bitter chocolate
noun: a spicy sauce flavored with chocolate, usually served with turkey or chicken

mole in British English 2
noun: a breakwater

mole in British English 3
noun

mole in British English 4
noun: the basic SI unit of amount of substance; the amount that contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12. The entity must be specified and may be an atom, a molecule, an ion, a radical, an electron, a photon, etc

mole in British English 5
noun: a fleshy growth in the uterus formed by the degeneration of fetal tissues

mole in British English 6
noun: a spicy Mexican sauce made from chili and chocolate