- to lengthen out in time; extend the duration of; cause to continue longer: to prolong one's stay abroad.
- to make longer in spatial extent: to prolong a line.
Origin of prolong
SynonymsSee more synonyms for on Thesaurus.com
1. See lengthen.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for prolong
We smile weakly, not wanting to let them down or prolong the conversation.The Malaysian Air Tragedy Reawakens a Primal Fear
Kelly Williams Brown
July 19, 2014
When he finally became president, Nixon walked away from that war to prolong a futile one half a world away.100 Years of Right (And Left) Moves
March 31, 2014
Drugs are becoming more powerful with prescription painkillers used to enhance effect and prolong a deleterious pleasure.Heroin: America’s Silent Assassin
Dr. Anand Veeravagu, MD, Robert M. Lober, MD, PhD
February 3, 2014
What the U.S. is doing now can only prolong Syrian and regional agonies.Face the Assad Reality In Syria
Frank G. Wisner, Leslie H. Gelb
January 26, 2014
In Congress, Radel has been a strong conservative and Tea Party favorite who voted to prolong the government shutdown in October.Hip-Hop Conservative Rep. Trey Radel Charged With Cocaine Possession
November 20, 2013
He will prolong your life and loosen every button on your waistcoat.The Underdog
F. Hopkinson Smith
Can they prolong their own possession, or lengthen his days who enjoys them?Joseph Andrews, Vol. 2
Then which of us can prolong our lives by one day or hour or minute?
And then why—why should we prolong a painful interview, Glory?
It is not to treat him as a friend to prolong this interview.The Historical Nights' Entertainment
- (tr) to lengthen in duration or space; extend
C15: from Late Latin prōlongāre to extend, from Latin pro- 1 + longus long
Word Origin and History for prolong
Online Etymology Dictionary, © 2010 Douglas Harper