molemole /moʊl/ ●○○ noun [countable] 1medicine a small brown mark on the skin that is sometimes slightly higher than the skin around itTHESAURUSmark, blemish, bruise, scar, pimple, zit, wart, blister, freckle► see thesaurus at mark22a small animal with brown fur that lives in holes in the ground, and that cannot see well3someone who works for an organization, especially a government, in order to secretly give information about it to its enemy4also mol science, chemistry an amount of a substance that contains 6.0225 × 10²³ atoms, molecules, etc., which is equal to the number of atoms in 12 grams of carbon-12