The telephone number for emergency services in the United States, Canada, Mexico, Belize, Costa Rica, Argentina, Uruguay, Ecuador, Saudi Arabia, Egypt, Jordan, Liberia, Ethiopia, the Philippines, Anguilla, Palau, and Tonga.

(Canada, US, metonymically) Emergency services; emergency service personnel. / (Canada, US, colloquial, metonymically) An emergency phone call. / (Canada, US, colloquial, metonymically) An emergency.

(Canada, US, colloquial) To call emergency services.

(automotive) A prominent family of sports cars manufactured by Porsche.

plural of 911

Third-person singular simple present indicative form of 911

plural of reverse 911 call

simple past tense and past participle of 911

present participle of 911

(US) A call initiated by emergency services to telephone numbers, to, for example, announce a mandatory evacuation.