Definition of the term Trim (Interior)

The finish materials in a building, such as moldings applied around openings (window trim, door trim) or at the floor and ceiling of rooms (baseboard, cornice, and other moldings). Also, the physical work of installing interior doors and interior woodwork, to include all handrails, guardrails, stairway balustrades, mantles, light boxes, base, door casings, cabinets, countertops, shelves, window sills and aprons, etc.