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Synonyms

deadline

American  
[ded-lahyn] / ˈdɛdˌlaɪn /

noun

  • deadlines
    plural
  1. the time by which something must be finished or submitted; the latest time for finishing something.

    a five o'clock deadline.

  2. a line or limit that must not be passed.

  3. (formerly) a boundary around a military prison beyond which a prisoner could not venture without risk of being shot by the guards.


deadline British  
/ ˈdɛdˌlaɪn /

noun

  1. a time limit for any activity

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of deadline

First recorded in 1855–60; dead + line 1

Explanation

A deadline is a date or time when something must be finished. At work and school, most projects have deadlines. If you don’t get your paper in by the deadline, you won’t get a good grade. If you think missing a deadline and getting a low grade is bad, think about how this word came to be: It was a line that went around a prison and if a prisoner crossed it, he could be shot. Now that’s a deadline! A deadline sounds scary, and it does frighten a lot of people — if you don't get a paper in by the deadline, you could lose points or fail. But hey, you’ll live.

Keep Reading on Vocabulary.com

Vocabulary lists containing deadline

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.

See Examples For:

And all after Balogun, 25, and both clubs had signed the deal sheet allowing the move to be completed after Tuesday's 23.00 BST transfer deadline.

From BBC Sep. 2, 2026

Filing Form 5500-EZ may not be especially difficult, but missing the deadline can result in significant penalties.

From MarketWatch Sep. 2, 2026

When the Cubs acquired Crow-Armstrong from the New York Mets as a low-level prospect at the trade deadline in 2021, they were initially a bit confused.

From The Wall Street Journal Sep. 2, 2026

Postal Service staff were rushing to meet an internal Sept. 1 deadline to get the system up-and-running, according to the whistleblower’s account.

From Salon Sep. 2, 2026

We’d almost hit the ten-minute deadline when Wab silently slipped in beside us.

From "The Marrow Thieves" by Cherie Dimaline

Delivery times are also crucial for buyers, currently under tight deadlines linked to EU funding programmes.

From BBC Aug. 25, 2026

I’d become used to a life where momentum meant deadlines and notifications.

From The Wall Street Journal Aug. 25, 2026

Federal officials set deadlines for the states to reach a consensus, but state negotiators missed those deadlines.

From Los Angeles Times Aug. 21, 2026

Each of these programs went years past their original delivery deadlines and cost far more than originally budgeted.

From Salon Aug. 20, 2026

Even when they were separated by a wall of drawings and deadlines, she was still there.

From "Caterpillar Summer" by Gillian McDunn

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