Meaning of “corroborate” - Learner’s Dictionary

corroborate

verb [ T ] us uk /kəˈrɒbəreɪt/ formal

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

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

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