Pronunciation: (dis-kred'it),[key] —v.t. 1. to injure the credit or reputation of; defame: an effort to discredit honest politicians. 2. to show to be undeserving of trust or belief; destroy confidence in: Later research discredited earlier theories. 3. to give no credence to; disbelieve: There was good reason to discredit the witness.
—n. 1. loss or lack of belief or confidence; disbelief; distrust: His theories met with general discredit. 2. loss or lack of repute or esteem; disrepute.
3. something that damages a good reputation: This behavior will be a discredit to your good name.