DictionarymoleHarbor barrier
noun

mole

A massive stone structure that shelters or encloses a harbor.

The stone mole protects the harbor from powerful ocean waves.

Etymology

The Latin word means a mass or large structure. The harbor sense specializes it for a massive built barrier that protects or encloses water.

More examples

  • Fishing boats shelter behind the mole during storms.
  • Workers replace damaged stone blocks along the mole.
  • The ferry enters the harbor between two moles.

Forms

mole · moles

Similar words

breakwater
Can be offshore and need not be built of stone.
jetty
Usually extends into water to guide currents or protect channels.