Bedeutung von “testify” im Essential American English Dictionary

testify

verb us /ˈtes·təˌfɑɪ/ present participle testifying, past tense and past participle testified

to give information and answer questions in a court of law:

The victim didn’t testify at the trial.
The baseball player testified that he had used drugs.

(Definition von “testify” aus dem Webster's Essential Mini Dictionary © Cambridge University Press)