Pronunciation: (ub-zûr'vu-tôr"ē, -tōr"ē),[key] —n., —pl.-ries. 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.