- The definition of pent-up is something that builds up and isn't expressed or released.
An example of pent-up is when you don't cry when you are sad.
pent-up definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
held in check; curbed; confined: pent-up emotion
pent-up definition by American Heritage Dictionary
Not given expression; repressed: pent-up emotions.