yaw Noun The rotation of an aircraft, ship, or missile about its vertical axis so as to cause the longitudinal axis of the aircraft, ship, or missile to deviate from the flight line or heading in its horizontal plane.
yaw Noun The angle between the longitudinal axis of a projectile at any moment and the tangent to the trajectory in the corresponding point of flight of the projectile.
yaw Noun An act of yawing.
yaw Noun A vessel's motion rotating about the vertical axis, so the bow yaws from side to side; a characteristic of unsteadiness.
yaw Noun The extent of yawing, the rotation angle about the vertical axis
yaw Verb To turn about the vertical axis while maintaining course.
yaw Verb To swerve off course to port or starboard.
yaw Verb To steer badly, zigzagging back and forth across the intended course of a boat; to go out of the line of course.