Meaning of smarten

smart•en

Pronunciation: (smär'tn), [key]
— v.t.
  1. to make more trim or spruce; improve in appearance (usually fol. by up): Try to smarten up your outfit.
  2. to make brisker, as a pace.
  3. to sharpen the judgment or broaden the experience of; educate (usually fol. by up): Someone has to smarten him up about dealing with people.
  4. to smarten up before dinner.
    1. to groom oneself:to smarten up before dinner.
    2. to become aware of one's mistakes, shortcomings, etc., and make efforts to correct them:If you don't smarten up, you're going to be out of a job.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.