noun A naevus, a pigmented, slightly raised, and sometimes hairy spot on the skin.
noun Any of several small, burrowing, insectivorous mammals of the family Talpidae.
noun Any of the burrowing rodents also called mole-rats.
noun An internal spy; a person who involves themself with an enemy organisation, especially an intelligence or governmental organisation, to determine and betray its secrets from within.
noun A kind of self-propelled excavator used to form underground drains, or to clear underground pipelines.
noun A type of underground drain used in farm fields, in which a mole plow creates an unlined channel through clay subsoil.
verb To create a network of channels in (waterlogged soil) to improve drainage.