scrim Syllabification: (scrim)Pronunciation: /skrim/Definition of scrim noun strong, coarse fabric, chiefly used for heavy-duty lining or upholstery. Theater a piece of gauze cloth that appears opaque until lit from behind, used as a screen or backdrop. a heatproof cloth put over film or television lamps to diffuse the light. North American a thing that conceals or obscures something:a thin scrim of fog covered the islandOrigin: late 18th century: of unknown originscrim in other Oxford dictionaries Definition of scrim in the British & World English dictionary