A first lieutenant (1940s+ Army)
noun 1. (often initial capital letters) the wife of the president of the U.S. or of the governor of a state. 2. the wife of the head of any country: the First Lady of Brazil. 3. the foremost woman in any art, profession, or the like: first lady of the American theater. noun (often capitals) […]
noun, Physics. 1. See under . noun, Physics. 1. 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 […]
noun 1. See under (def 1). noun 1. any of three principles variously stated in equivalent forms, being the principle that the change of energy of a thermodynamic system is equal to the heat transferred minus the work done (first law of thermodynamics) the principle that no cyclic process is possible in which heat is […]
noun 1. . noun 1. a lien having priority over others attached to the same property.