Princeton's WordNet

1. operating room, OR, operating theater, operating theatre, surgery(noun)

   a room in a hospital equipped for the performance of surgical operations

   "great care is taken to keep the operating rooms aseptic"

Kernerman English Learner's Dictionary

1. operating room(noun)ˈɒp əˌreɪt

   the room in which surgeons do operations

   He was taken straight into the operating room.

Wiktionary

1. operating room(Noun)

   a room in a hospital used for performing surgery

• operasiekamer, teaterAfrikaans
• غُرْفَة العَمَلِيّات الجِراحِيَّهArabic
• операционнаBulgarian
• sala de cirurgiaPortuguese (BR)
• operační sálCzech
• der OPGerman
• operationsstueDanish
• μέγαρο λυρικής σκηνήςGreek
• quirófanoSpanish
• operatsioonisaalEstonian
• اتاق عملFarsi
• leikkaussaliFinnish
• salle d'opération, bloc opératoireFrench
• חָדַר נִיתוּחִיםHebrew
• आपरेशन का कमराHindi
• operacijska salaCroatian
• gedung operaIndonesian
• skurðarstofaIcelandic
• teatro dell'opera*, teatro lirico*Italian
• 手術室Japanese
• 수술실Korean
• operacinëLithuanian
• operteātrisLatvian
• bilik bedahMalay
• operatiekamerDutch
• operasjonsstueNorwegian
• اتاق عملPersian
• د عمليات اطاقPashto
• sală de ope­raţiiRomanian
• операционнаяRussian
• operacijska dvoranaSlovenian
• operaciona salaSerbian
• operationssalSwedish
• ห้องผ่าตัดThai
• ameliyathaneTurkish
• 手術室Chinese (Trad.)
• операційнаUkrainian
• جراحي کا کمرہUrdu
• phòng mổVietnamese
• 手术室Chinese (Simp.)