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Noun [edit]. neap tide â(plural neap tides). 1  The tide which occurs just after the first and third quarters of the moon, when there is least difference between high tide and low tide. 2  Spring tides occur when the Sun and Moon line up, since the gravities of the two bodies add together to create larger tidal forces.
Neap tides occur when the sun and moon are at right angles to each other (First Quarter & Last Quarter moon phases). Neap tides are less dramatic than regular tides. Neap ti â¦ des occur twice per lunar period.