noun Usage: often attributive Date: 1938 something having three basic components or levels: as, trilogy , a sandwich consisting of three pieces of bread and two layers of filling, a 3-story dwelling with an apartment on each floor
TRIPLE-DECKER
Meaning of TRIPLE-DECKER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012