any of three laws of classical mechanics, either the law that a body remains at rest or in motion with a constant velocity unless an external force acts on the body (first law of motion) the law that the sum of the forces acting on a body is equal to the product of the mass of the body and the acceleration produced by the forces, with motion in the direction of the resultant of the forces (second law of motion) or the law that for every force acting on a body, the body exerts a force having equal magnitude and the opposite direction along the same line of action as the original force (third law of motion or law of action and reaction)
noun, Chemistry. 1. the statement that where two elements can combine to form more than one compound, the ratio by weight of one element to a given weight of the second is usually a small whole number.
noun 1. . noun 1. another term for international law
- Law of nature
noun 1. an empirical truth of great generality, conceived of as a physical (but not a logical) necessity, and consequently licensing counterfactual conditionals 2. a system of morality conceived of as grounded in reason See natural law (sense 2), nomological (sense 2) 3. See law1 (sense 8)
noun, Philosophy. 1. a principle according to which an explanation of a thing or event is made with the fewest possible assumptions.