noun (plural -ries) Etymology: probably from New Latin observatorium, from Latin observare Date: 1676 a building or place given over to or equipped for observation of natural phenomena (as in astronomy), a situation or structure commanding a wide view
OBSERVATORY
Meaning of OBSERVATORY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012