black·out
ˈblak-ˌau̇t 
1
a
: a turning off of the stage lighting to separate scenes in a play or end a play or skit
also
: a skit that ends with a blackout
b
: a period of darkness enforced as a precaution against air raids
c
: a period of darkness (as in a city) caused by a failure of electrical power
2
: a transient dulling or loss of vision, consciousness, or memory
an alcoholic blackout
3
a
: a wiping out : obliteration
b
: a blotting out by censorship : suppression
a news blackout
4
: a usually temporary loss of a radio signal
5
: the prohibition or restriction of the telecasting of a sports event
6
: a time during which a special commercial offer (as of tickets) is not valid
—usually used attributively
blackout dates
blacked out; blacking out; blacks out
1
2
: to envelop in darkness
black out the stage
3
: to make inoperative (as by a power failure)
4
: to impose a blackout on
blacked out the local game
1
: to become enveloped in darkness
2
: to undergo a temporary loss of vision, consciousness, or memory
Examples of blackout in a Sentence
Noun
the blackouts of World War II
She keeps flashlights and candles handy in case of a blackout.
He told his doctor he had been experiencing blackouts.
Verb
had spent most of her adulthood trying to black out memories of a wretched childhood
with the delivery of the knockout punch, the screen blacks out, and in the next scene the boxer wakes up in the hospital
Recent Examples on the Web
Shoko Wanger, Architectural Digest, 30 June 2025
Amid heavy government censorship and widespread internet blackouts, many Iranians rely on VPNs and other tools to bypass restrictions and access the outside world.
—Amir Daftari, MSNBC Newsweek, 30 June 2025
Benjamin Vanhoose, People.com, 17 June 2025
Meanwhile, the Chicago Sports Network, the team’s new TV home, remains blacked out to 1 million Comcast subscribers in the city and suburbs during an ongoing carriage dispute.
—Robert Channick, Chicago Tribune, 4 June 2025
See All Example Sentences for blackout
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Noun
Cover a glass door with RYB Home’s poly-linen blackout curtains, which promise 100% sunlight blockage and can accommodate up to 84-inch-long surfaces.
—Shoko Wanger, Architectural Digest, 30 June 2025
Amid heavy government censorship and widespread internet blackouts, many Iranians rely on VPNs and other tools to bypass restrictions and access the outside world.
—Amir Daftari, MSNBC Newsweek, 30 June 2025
Verb
He was blacked out and drinking, a lot of drug doing, alcohol, and that is always a recipe for disaster.
—Benjamin Vanhoose, People.com, 17 June 2025
Meanwhile, the Chicago Sports Network, the team’s new TV home, remains blacked out to 1 million Comcast subscribers in the city and suburbs during an ongoing carriage dispute.
—Robert Channick, Chicago Tribune, 4 June 2025
See All Example Sentences for blackout
Cite this Entry
“Blackout.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blackout. Accessed 6 Jul. 2025.
Copy CitationKids Definition
blackout
noun
black·out
ˈblak-ˌau̇t
1
: a period when lights are kept off to guard against enemy airplane attack in a war
2
: a period when lights are off as a result of an electrical power failure
3
: a temporary dulling or loss of vision or consciousness
black out
verb
-ˈau̇t
Medical Definition
blackout
1 of 2 noun
black·out
ˈblak-ˌau̇t
black out
2 of 2 intransitive verb
: to cause to black out
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