law of gravitation, Newton's law of gravitation - (physics) the law that states any two bodies attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them

natural philosophy, physical science, physics - the science of matter and energy and their interactions

constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"