Definitions for "SPRING TIDE"
Keywords:  tide, neap, moon, tidal, syzygy
tide cycle of unusually large amplitude that occurs twice monthly when the lunar and solar tides are in phase. (Compare Neap tide.)
A tide of greater range than an average (“ordinary”) tide due to the sun's and moon's gravitational forces acting on the sea approximately in line with each other. Spring and neap tides occur in sequence following a lunar half-monthly cycle of approximately 15 days.  There are also longer-term cycles that vary according to astronomic circumstances.
A tide that occurs when the moon is new or full and has a greater range than those at other times