I. noun Date: 1571 something (as an apartment) that is ~, II. adjective see: -fold Date: 1655 threefold , triple , having three apartments, floors, or sections
TRIPLEX
Meaning of TRIPLEX in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012