Dictionary.com
Thesaurus.com
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:

Texans for Gregg Abbott had $67 million on hand as of the last filing deadline in mid-July, while Hinojosa had $3 million.

From Slate ● Sep. 28, 2026

There might be more clarity by Nov. 15, the deadline by which the government and the big oil producers are expected to reach definitive agreements.

From The Wall Street Journal ● Sep. 28, 2026

The new deadline to apply for HUD funding is Oct.

From Los Angeles Times ● Sep. 25, 2026

The club said it had been given a deadline of the end of this season but "being high risk it would be good to complete this side of Christmas".

From BBC ● Sep. 25, 2026

I have enclosed an application form for you to complete and return to me before the deadline marked on it.

From "Kaffir Boy: An Autobiography" by Mark Mathabane

Faculty “also describe challenges around deadlines due to students’ competing commitments, including frequent requests for extensions and difficulties communicating pro-actively when work cannot be completed on time.”

From The Wall Street Journal ● Sep. 24, 2026

In a draft rule, the EPA argued these standards were impossible to meet and the deadlines too tight.

From Barron's ● Sep. 14, 2026

It has more rules, more recordkeeping and more deadlines.

From MarketWatch ● Sep. 2, 2026

LAX’s long-awaited Skylink train is 99% complete yet faces mounting uncertainty, as bond ratings sink into junk territory and looming 2026 deadlines raise the specter of default and termination.

From Los Angeles Times ● Aug. 28, 2026

“The application deadlines for some have passed, but I’ll check when we get back to my office. You’ll also need to take the SAT. I’ve signed you up for it.”

From "Breaking Through" by Francisco Jiménez

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training