Grav·i·tate v. i. [imp. & p. p. Gravitated p. pr. & vb. n. Gravitating ] To obey the law of gravitation; to exert a force or pressure, or tend to move, under the influence of gravitation; to tend in any direction or toward any object.
Why does this apple fall to the ground? Because all bodies gravitate toward each other. --Sir W. Hamilton.
Politicians who naturally gravitate towards the stronger party. --Macaulay.