- 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 on Thesaurus.com
1. See lengthen.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (tr) to lengthen in duration or space; extend
C15: from Late Latin prōlongāre to extend, from Latin pro- 1 + longus long
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
Word Origin and History for prolongment
Online Etymology Dictionary, © 2010 Douglas Harper