Mole

/moʊl/

Meaning & Definition

noun

A small, burrowing mammal with dark fur, a snout, and spade-like hands.

The garden was overrun by moles, leaving small mounds of dirt everywhere.

A spy who infiltrates an organization for secret information.

The agency discovered that there was a mole within their ranks leaking sensitive information.

A skin mark or growth, often dark and raised.

She went to the dermatologist to have a suspicious mole checked out.

A unit in chemistry, equal to 6.022 × 10²³ entities.

In the experiment, we measured the concentration of the solution in moles.

Middle English 'mole', from Old English 'mūle', of uncertain origin.

a mole in the organization:

someone who secretly works for a competitor or enemy inside an organization.

to mole around:

to move slowly or aimlessly.

An informant or spy.

He was working with the cops, he's a mole.

A person who works undercover.

The agency sent in a mole to gather intelligence.