From Longman Dictionary of Contemporary Englishoperating theatreˈoperating ˌtheatre noun [countable] British English MHa room in a hospital where operations are done SYN operating room American English
Examples from the Corpus
operating theatre• His shaping room had the brightly lit intensity of an operating theatre, the mystery of a chemical laboratory.• From the small gallery above the operating theatre the whole process was obscure, if sickeningly bloody, to the watching Cowley.• You closed the door like a surgeon entering the operating theatre.• Once again she was aware of the sounds in the operating theatre.• The powerful surgeon in the operating theatre is powerless sitting in the dentists chair.• At the hospital, a surgeon was called and the boy was taken immediately into the operating theatre.• Spiralling leg fractures, cysts, ventricle failure also saw her whisked into the operating theatre. 