911

[ nahyn-wuhn-wuhn, nahyn-i-lev-uhn ]

/ ˈnaɪnˌwʌnˈwʌn, ˈnaɪn ɪˈlɛv ən /

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(in the U.S. and Canada) a telephone number used to reach emergency services, as the police, the fire department, or an ambulance.

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Origin of 911

First recorded in 1965–70

Words nearby 911

78, 7-dehydrocholesterol, “800” number, 8d, 900 number, 911, a, A1, A1c, A2, A2 level

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 .

How to use 911 in a sentence

The Air Force has enough MQ-1 Predator and MQ-9 Reaper drones.
Exclusive: U.S. Drone Fleet at ‘Breaking Point,’ Air Force Says|Dave Majumdar|January 5, 2015|DAILY BEAST
The Raptor carries six AMRAAMs and two shorter range AIM-9 Sidewinder missiles inside its weapons bays.
Pentagon Worries That Russia Can Now Outshoot U.S. Stealth Jets|Dave Majumdar|December 4, 2014|DAILY BEAST
But what spurred him to action was a Washington Post study of the post-9/11 veteran population.
The Next Greatest Generation|Nina Strochlic|November 18, 2014|DAILY BEAST
It was lunchtime when a tracked launcher with four SA-11 surface-to-air missiles rolled into town and parked on Karapetyan Street.
MH17 Missile Can't Hide From These Internet Sleuths|Eliot Higgins|August 2, 2014|DAILY BEAST

But before the FAA acted an ancient ValuJet DC-9 crashed in Florida, killing 110 people.
Malaysia Airlines Is Going Down|Clive Irving|August 1, 2014|DAILY BEAST
The "remoteness" and the "distance which was not measurable" somehow came to be packed within these two dates,1865-9.
The Contemporary Review, Volume 36, November 1879|Various
The PDP-9 first tries to reconstruct a vertex from the proton trajectories.
On-Line Data-Acquisition Systems in Nuclear Physics, 1969|H. W. Fulbright et al.
The two PDP-9's are coupled only by a switchable tape drive, with no plans at present for direct channel-to-channel communication.
On-Line Data-Acquisition Systems in Nuclear Physics, 1969|H. W. Fulbright et al.
Spinning a small wheel at the side of the control panel, Tom reported, "Feeders at D-9 rate, sir!"
On the Trail of the Space Pirates|Carey Rockwell
Their special merit is that one can work121 at f/8 or f/11, and get a picture sharp up to the edges.
The Barnet Book of Photography|Various

Cultural definitions for 911

9-11

See September 11 attacks.