Meaning of “corroborate” - Learner’s Dictionary

corroborate

verb [ T ] uk us /kəˈrɒbəreɪt/ formal

to say something or provide information that supports what someone says:

A witness corroborated his account of the accident.
corroboration uk us /kəˌrɒbəˈreɪʃən/ noun [ U ]

(Definition of “corroborate” from the Cambridge Learner’s Dictionary © Cambridge University Press)