Meaning of discredit

dis•cred•it

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.

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.