- a specially equipped room, usually in a hospital, where surgical procedures are performed. Abbreviation: OR
Origin of operating room
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for operating room
Carlotta Harrison pleaded a headache, and was excused from the operating-room and from prayers.
He was in high spirits that first day of Sidney's operating-room experience.
The operating-room was a hive of industry, and tongues kept pace with fingers.
When are you going to put my protegee into the operating-room?
She has been waiting for hours—ever since you went to the operating-room.
- A room equipped for performing surgical operations.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.