Home › Words › L › liplinerliplinerlipliner means A cosmetic product intended to fill uneven areas on the outer edges of the lips after applying lipstick, therefore giving a smooth shape.EtymologyFrom lip + liner.nounA cosmetic product intended to fill uneven areas on the outer edges of the lips after applying lipstick, therefore giving a smooth shape.Definitions & examples from Wiktionary (CC BY-SA 3.0).