physics /ˈfɪz.ɪks/ noun[plural only]2 •the science that studies energy, forces, space and time, and what all things are made ofNewtonian physics was extended by Einstein to explain the effects of travelling near the speed of light; quantum physics extends it to account for the behaviour of atoms. •The physical aspects of a phenomenon or a system, especially those examined or studied scientifically.The physics of car crashes would not let Tom Cruise walk away like that.
