operating room


a specially equipped room, usually in a hospital, where surgical procedures are performed. Abbreviation: OR

Nearby words

  1. operatic,
  2. operating,
  3. operating budget,
  4. operating income,
  5. operating microscope,
  6. operating system,
  7. operating table,
  8. operating theatre,
  9. operation,
  10. operation barbarossa

Origin of operating room

First recorded in 1885–90

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for operating room

Medicine definitions for operating room

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.