Dictionary.com

911

[ nahyn-wuhn-wuhn, nahyn-i-lev-uhn ]
/ ˈnaɪnˌwʌnˈwʌn, ˈnaɪn ɪˈlɛv ən /
Save This Word!

(in the United States and Canada) the telephone number used to reach emergency medical, fire, and police services.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of 911

First recorded in 1965–70

Words nearby 911

Other definitions for 911 (2 of 2)

9/11

or 9-11

[ nahyn-i-lev-uhn ]
/ ˈnaɪn ɪˈlɛv ən /

September 11, 2001: the day on which Islamic terrorists, believed to be part of the Al-Qaeda network, hijacked four commercial airplanes and crashed two of them into the World Trade Center in New York City and a third one into the Pentagon in Virginia: the fourth plane crashed into a field in rural Pennsylvania.
Also called nine-eleven .
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use 911 in a sentence

Cultural definitions for 911

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK