- To discredit is defined as to cast doubt on the truth of something or someone, or to damage a person's reputation.
When you tell everyone that your professor knows nothing and show evidence to prove it, this is an example of a time where you discredit your professor.
- to reject as untrue; disbelieve
- to be a reason for disbelieving or distrusting; cast doubt on: their earlier lies discredit anything they may say
- to damage the credit or reputation of; disgrace
- absence or loss of belief or trust; disbelief; doubt
- damage to one's reputation; loss of respect or status; disgrace; dishonor
- something that causes disgrace or loss of status
transitive verbdis·cred·it·ed, dis·cred·it·ing, dis·cred·its
- To damage in reputation; disgrace: a report on corruption that discredited the mayor.
- To cause to be doubted or distrusted: new scientific evidence that discredits earlier theories.
- To refuse to believe: discredit a story as mere gossip.
- Loss of respect or damage to one's reputation: an incident that brought discredit on the school.
- Lack or loss of trust or belief; doubt: evidence that brings the popular notion into discredit.
- Something that brings disgrace or distrust: He is a discredit to his family.
(third-person singular simple present discredits, present participle discrediting, simple past and past participle discredited)
dis- + credit.