home Julia Galdo observatory ob⋅serv⋅a⋅to⋅ry [uhb-zur-vuh-tawr-ee] –noun 1. a place or building equipped and used for making observations of astronomical, meteorological, or other natural phenomena, esp. a place equipped with a powerful telescope for observing the planets and stars. 2. an institution that controls or carries on the work of such a place. 3. a place or structure that provides an extensive view; lookout. observatory office observe old oneiric o a b c d e f g h i j k l m n o p q r s t u v w x y z open outlook overcast orange