(1):

(v. t.) To regard as good; to commend; to be pleased with; to think well of; as, we approve the measured of the administration.

(2):

(v. t.) To make or show to be worthy of approbation or acceptance.

(3):

(v. t.) To make profit of; to convert to one's own profit; - said esp. of waste or common land appropriated by the lord of the manor.

(4):

(v. t.) To show to be real or true; to prove.

(5):

(v. t.) To sanction officially; to ratify; to confirm; as, to approve the decision of a court-martial.

(6):

(v. t.) To make proof of; to demonstrate; to prove or show practically.