TIDAL

adj. relating to, like, or affected by tides (tidal basin; tidal river). tidal bore a large wave or bore caused by constriction of the spring tide as it enters a long narrow shallow inlet. tidal flow the regulated movement of traffic in opposite directions on the same stretch of road at different times of the day. tidal wave 1 Geog. an exceptionally large ocean wave esp. one caused by an underwater earthquake or volcanic eruption. 2 a widespread manifestation of feeling etc. tidally adv.