1give credit to (someone) for something:he was accredited with being one of the world’s fastest sprinters
(accredit something to) attribute an action, saying, or quality to:the discovery of distillation is usually accredited to the Arabs
2(of an official body) give authority or sanction to (someone or something) when recognized standards have been met:institutions that do not meet the standards will not be accredited for teacher training (as adjective accredited)an accredited practitioner
3give official authorization for (someone, typically a diplomat or journalist) to be in a particular place or to hold a particular post:no journalist accredited to the UN has ever been expelled