n. & v.
n. 1 harm to reputation (brought discredit on the enterprise). 2 a person or thing causing this (he is a discredit to his family). 3 lack of credibility; doubt (throws discredit on her story). 4 the loss of commercial credit.
v.tr. (-credited, -crediting) 1 harm the good reputation of. 2 cause to be disbelieved. 3 refuse to believe.