prolong
Americanverb (used with object)
-
to lengthen out in time; extend the duration of; cause to continue longer.
to prolong one's stay abroad.
- Antonyms:
- abbreviate
-
to make longer in spatial extent.
to prolong a line.
verb
Related Words
See lengthen.
Other Word Forms
- prolongable adjective
- prolongableness noun
- prolongably adverb
- prolongation noun
- prolonger noun
- prolongment noun
- unprolongable adjective
Etymology
Origin of prolong
First recorded in 1375–1425; late Middle English prolongen, from Late Latin prōlongāre “to lengthen,” equivalent to prō- “forward, forth” + long(us) “long” + -ā- theme vowel + -re infinitive ending; pro- 1, long 1
Explanation
I don't want to prolong this definition, so I'll keep it short. To prolong is to make something last longer or to stretch it out in time. You see the word long in prolong and it's no trick. If you prolong an argument with a sibling, you make it longer than it naturally would be. Prolong always has to do with time. When you stretch your neck or a piece of cloth to make it appear longer, you are elongating, not prolonging, it.
Vocabulary lists containing prolong
Christmas Carol Vocab: A Lyrical Lexicon
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
ACT Vocabulary List
Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!
Words for Carolers
Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!
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.
It likely will prolong the conflict, now entering its seventh week, and the economic and market damage it has wrought well into the summer months.
From Barron's • Apr. 13, 2026
The OECD’s chief economist, Stefano Scarpetta, warned that damage to energy infrastructure from the Middle East conflict could prolong high energy prices.
From The Wall Street Journal • Apr. 9, 2026
Babies can be identified as having SMA through a heel prick test and early treatment can prolong their lives.
From BBC • Mar. 22, 2026
There are less rules outside, fewer boundaries: coffee dates prolong, walks meander, thoughts digress.
From Los Angeles Times • Mar. 13, 2026
“I know you can hear me, and I understand if you don’t want to respond, though I am curious. What did you really hope to accomplish here? All you did was prolong my inevitable victory.”
From "The Last Last-Day-of-Summer" by Lamar Giles
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
