1. a small dark spot on the skin
2. a small mammal with dark fur that lives underground and digs tunnels
3. a person who works secretly within an organization to provide information to enemies or competitors

Examples

• She had a small mole on her cheek.
• The mole dug tunnels throughout the garden.
• The FBI discovered a mole in their organization.
• The chemist calculated how many moles of oxygen were needed.
• The ancient mole protected the harbor from rough waves.
• Moles can damage lawns with their underground tunnels.
• The spy worked as a mole for several years before being caught.