1. Generally, any pattern with some roughly identifiable periodicity in time and/or space. This applies, in meteorology, to atmospheric waves in the horizontal flow pattern (e. G. , Rossby wave, long wave, short wave, cyclone wave, barotropic disturbance). See Also inertia wave. 2. At the surface of the ocean, a disturbance generated by wind action with dynamics governed by the influence of gravity and/or surface tension. See ocean waves. 3. Popularly used as a synonym for “surge” or “influx,” as in tidal wave (storm surge), heat wave, cold wave.