to put under pledge; to pledge; to place under obligations to do or forbear doing something, as by a pledge, oath, or promise; to bind by contract or promise.-to gain for service; to bring in as associate or aid; to enlist; as, to engage friends to aid in a cause; to engage men for service.-to gain over; to win and attach; to attract and hold; to draw.-to employ the attention and efforts of; to occupy; to engross; to draw on.-to enter into contest with; to encounter; to bring to conflict.-to come into gear with; as, the teeth of one cogwheel engage those of another, or one part of a clutch engages the other part.-to promise or pledge one's self; to enter into an obligation; to become bound; to warrant.-to embark in a business; to take a part; to employ or involve one's self; to devote attention and effort; to enlist; as, to engage in controversy.-to enter into conflict; to join battle; as, the armies engaged in a general battle.-to be in gear, as two cogwheels working together.