verb

• (transitive) To officially sanction; to ratify; to confirm; to set as satisfactory.
  "Although we may disagree with it, we must nevertheless approve the sentence handed down by the court-martial."
• (transitive) To regard as good; to commend; to be pleased with; to think well of.
  "We approve the measure of the administration, for it is an excellent decision."
• (transitive, archaic) To make proof of; to demonstrate; to prove or show practically.
  "He had long burned with impatience to approve his valour."
• (intransitive, followed by "of") To consider worthy (to); to be pleased (with); to accept.
  "Her mother never approves of any of her boyfriends. She thinks nobody is good enough for her little girl."

verb

• (transitive, law, English law) To make profit of; to convert to one's own profit — said especially of waste or common land appropriated by the lord of the manor.