English Noun double adapter (plural double adapters) Any of several devices that allow two electrical items to be plugged into a single power outlet. Translations device Georgian: ტრაინიკი (ṭrainiḳi) Russian: двухме́стный ада́птер m (dvuxméstnyj adáptɛr), тройни́к (ru) m (trojník) (with three sockets)