springtide

WordReference Random House Learner's Dictionary of American English © 2025

ˈspring ˈtide, n. [countable]

1. Meteorology the large rise and fall of the tide at or soon after the new or the full moon.

WordReference Random House Unabridged Dictionary of American English © 2025

spring′ tide′, 

1. Meteorology the large rise and fall of the tide at or soon after the new or the full moon. See diag. under tide ¹.
2. any great flood or swelling rush:
   a spring tide of compliments.
• 1520–30

Collins Concise English Dictionary © HarperCollins Publishers::

spring tide noun

1. either of the two tides that occur at or just after new moon and full moon when the tide-generating force of the sun acts in the same direction as that of the moon, reinforcing it and causing the greatest rise and fall in tidal level. The highest spring tides (equinoctial springs) occur at the equinoxes
   Compare neap tide
2. any great rush or flood