1. To declare or make legally valid; SYN. formalize.
2. To give evidence for; SYN. corroborate.
3. To make valid or confirm the validity of, as of a document.
4. To prove valid; show or confirm the validity of something.

1. To enhance or try to enhance the price, value, or status of by organized and usually governmental action
2. To assign value or merit to; validate

1. To fix or determine the value of; assign a value to, as of jewelry or art work.
2. To hold in esteem; to consider valuable.