oscillation /ˌäsəˈlāSH(ə)n/ noun 1. movement back and forth at a regular speed • the natural oscillation of a spring • the oscillations of a pendulum. 2. variation or fluctuation between two extremes of opinion, action, or quality • the plot's oscillation between bleak and comic elements. 3. [Physics] regular variation in magnitude or position around a central point.
