Question

Define spring tide!!

Answer 1

Answer:

A proxigean spring tide is a tide that occurs three or four times per year when a perigee coincides with a spring tide. This tide usually adds only a couple of inches to normal spring tides. 

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Answer 2

Answer:

proxigean spring tide (also known as a perigean spring tide) is a tide that occurs three or four times per year when a perigee (the point nearest Earth that the Moon reaches during its 27.3-day elliptic orbit) coincides with a spring tide (when the Sun, the Moon, and Earth are nearly aligned every two weeks).[1] This tide usually adds only a couple of inches to normal spring tides.[1]

Astronomical causes