That species of attraction or force by which all bodies or particles of matter in the universe tend toward each other; called also attraction of gravitation, universal gravitation, and universal gravity. See Attraction, and Weight.
Not believing in force is the same as not believing in gravitation. Thomas Hobbes
Now to consult the rules of composition before making a picture is a little like consulting the law of gravitation before going for a walk. Such rules and laws are deduced from the accomplished fact; they are the products of reflection. Edward Weston
The birth of science as we know it arguably began with Isaac Newton's formulation of the laws of gravitation and motion. It is no exaggeration to say that physics was reborn in the early 20th-century with the twin revolutions of quantum mechanics and the theory of relativity. Paul Davies
A true man never frets about his place in the world, but just slides into it by the gravitation of his nature, and swings there as easily as a star. Edwin Hubbel Chapin