- To prolong is to make something last longer.
When you read the last few pages of a good book very slowly so you can enjoy reading it longer, this is an example of a time when you prolong the book.
Origin: Middle English prolongen from Middle French prolonguer from Late Latin prolongare from Classical Latin pro-, forth plush longus, long: see pro- and amp; long
Used by arrangement with John Wiley & Sons, Inc.
transitive verb pro·longed, pro·long·ing, pro·longs
- To lengthen in duration; protract.
- To lengthen in extent.
Origin: Middle English prolongen, from Old French prolonguer, from Late Latin prōlongāre : Latin prō-, forth; see pro-1 + Latin longus, long; see del-1 in Indo-European roots.
- pro·longˈer noun