A qualification, achievement, personal quality, or aspect of a person's background, typically when used to indicate that they are suitable for something
A document or certificate proving a person's identity or qualifications
A letter of introduction given by a government to an ambassador before a new posting
giving a title or claim to credit or confidence [n -S] / to give credentials to [v CREDENTIALED or CREDENTIALLED, CREDENTIALING or CREDENTIALLING, CREDENTIALS]