1. to show that something is true by providing evidence or argument
Usage: third person singular present tense of ‘prove’
2. to turn out to be; to be found to be through experience or testing
Usage: third person singular present tense of ‘prove’

Examples

• The scientist proves her theory with careful experiments.
• This evidence proves that he was innocent.
• The new medicine proves effective against the disease.
• Time proves that hard work pays off.
• The recipe proves difficult for beginners.
• She proves herself capable of handling responsibility.
• The witness proves unreliable under questioning.