- To strengthen is to make stronger.
- An example of strengthen is to lift weights to make stronger muscles.
- An example of strengthen is to reinforce a beam.
strengthen definition by Webster's New World
transitive verb, intransitive verb
to increase in strength; make or become stronger
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- strengthener noun
strengthen definition by American Heritage Dictionary
verb strength·ened, strength·en·ing, strength·ens verb, transitive
To make strong or increase the strength of.verb, intransitive
To become strong or stronger.
- strengthˈen·er noun