·noun A treatise; a tract.
II. Treaty ·noun A proposal tending to an Agreement.
III. Treaty ·noun The act of treating for the adjustment of differences, as for forming an agreement; negotiation.
IV. Treaty ·noun An agreement so made; specifically, an agreement, league, or contract between two or more nations or sovereigns, formally signed by commissioners properly authorized, and solemnly ratified by the several sovereigns, or the supreme power of each state; an agreement between two or more independent states; as, a treaty of peace; a treaty of alliance.