emergency exit
US /ɪˈmɜːr.dʒən.si ˈek.sɪt/
UK /ɪˈmɜːr.dʒən.si ˈek.sɪt/

1.
非常口
a way out of a building, especially a public building, that can be used in an emergency, for example if there is a fire
:
•
In case of fire, please use the nearest emergency exit.
火災の場合は、最寄りの非常口をご利用ください。
•
The plane's emergency exits are clearly marked.
飛行機の非常口は明確に表示されています。