The word mole when used alone, has several possible meanings in the English language:

• Mole (animal): a small burrowing mammal.
• Naked Mole Rat: a rat that lives underground.
• Mole (unit): the SI unit for the number of molecules or atoms of a substance.
• Mole machine: a vehicle designed to travel underground by boring a tunnel.
• Mole (espionage): a spy working under deep-cover.
• The Mole: a reality television series.
• Mole (skin marking): a small spot of darkened pigment on the skin.
• Mole (sauce): a Mexican sauce made from chili peppers mixed with spices, unsweetened chocolate, peanuts and other ingredients.
• Mole (architecture): a massive structure, usually of stone, used as pier, breakwater or junction between places separated by water.
• Mole may also refer to the medical condition also known as molar pregnancy.