Pronunciation: (i-stab'lish),[key] —v.t. 1. to found, institute, build, or bring into being on a firm or stable basis: to establish a university; to establish a medical practice. 2. to install or settle in a position, place, business, etc.: to establish one's child in business. 3. to show to be valid or true; prove: to establish the facts of the matter. 4. to cause to be accepted or recognized: to establish a custom; She established herself as a leading surgeon. 5. to bring about permanently: to establish order. 6. to enact, appoint, or ordain for permanence, as a law; fix unalterably.
7. to make (a church) a national or state institution.
8. Cards.to obtain control of (a suit) so that one can win all the subsequent tricks in it.