Dictionary.com
Thesaurus.com
Synonyms

911

American  
[nahyn-wuhn-wuhn, nahyn-i-lev-uhn] / ˈnaɪnˌwʌnˈwʌn, ˈnaɪn ɪˈlɛv ən /
  1. (in the United States and Canada) the telephone number used to reach emergency medical, fire, and police services.


Etymology

Origin of 911

First recorded in 1965–70

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He called 911 twice to report the blaze, but said nothing about how it started, according to evidence presented in a downtown federal courthouse Thursday morning.

From Los Angeles Times • Jun. 12, 2026

The video, the affidavit stated, was taken minutes before the 911 call was made that day.

From Los Angeles Times • Jun. 10, 2026

His primary attorney Steve Haney contends that the fire was instead set off by people using fireworks, and that his client was a "Good Samaritan" who called 911 a total of 17 times.

From Barron's • Jun. 8, 2026

“Based on what is happening currently with emergency services like 911 in L.A., there needs to be something that can supplement that system, because we’re seeing that it’s not working,” he said.

From Slate • Jun. 3, 2026

The next time she called 911, she was going to request cops who wouldn't send her alone into an occupied building.

From "Eleanor & Park" by Rainbow Rowell

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "911" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com