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mole

C1
Fairly common

Pronunciation

UK

  • /mɔʊl/noun

US

  • /ˈmoʊl/

Meanings

Noun

  1. a small burrowing mammal with velvety fur and poor eyesight

  2. a small dark spot on the skin

  3. a person secretly placed within an organization to gather information

More meanings
  1. a rich Mexican sauce made with chiles and other ingredients

  2. the SI unit for amount of substance in chemistry

Beyond the definition

When you hear the word "mole," you likely imagine a small, velvety mammal digging tunnels and leaving mounds of dirt on a lawn. However, this word is surprisingly versatile. It also refers to a dark spot on your skin, often called a beauty mark. In the world of espionage, a "mole" is a secret agent who works undercover inside an organization to gather information. Finally, in chemistry, a mole is a standard unit used to measure the amount of a substance, helping scientists count an enormous number of atoms or molecules at once.

Examples

  1. 1

    Animal

    A mole has been digging tunnels under our lawn.

  2. 2

    Skin mark

    She has a small mole near her left eye.

  3. 3

    Medical check

    The doctor said the mole on his shoulder should be checked.

  4. 4

    Medical treatment

    He had a mole removed last month.

More examples
  1. 5

    Secret informer

    The police discovered a mole inside the gang.

  2. 6

    Chemistry amount

    In chemistry, one mole of carbon contains a huge number of atoms.

    • Domainin chemistry, a mole

      a standard amount

See also

Contrast

  • surface dweller

Do not confuse

Used with (collocations)

  • mole hill
  • mole tunnel
  • blind as a mole

Explore

Forms and spellings

1 form open this card.

Main spelling

  • molenoun