1. to show that something is true by providing evidence or argument
2. to show or test the quality, worth, or reliability of something
3. to turn out to be; to be found to be after experience or trial

Examples

• The scientist worked to prove her theory with experiments.
• He proved his innocence with an alibi.
• The new employee proved herself to be very reliable.
• This recipe proved to be more difficult than expected.
• Can you prove that you were at home last night?
• The medicine proved effective against the disease.
• Time will prove whether this decision was correct.