confirmative
🇺🇸
/kən'fɜmətɪv/
🇬🇧
/kən'fɜ:mətɪv/
Something that proves or supports a statement or theory.
The test results were confirmative, which means they supported the theory.
Helping to make something certain or true; positive.
The witness's words were confirmative, which means they agreed with the defendant's story.