- 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
Synonyms for prolong
1. See lengthen.
Antonyms for prolong
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (tr) to lengthen in duration or space; extend
Word Origin for prolong
C15: from Late Latin prōlongāre to extend, from Latin pro- 1 + longus long
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