high tide

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

ˈhigh ˈtide, n. 

1. Oceanography the tide at its highest level of elevation:
   [countable] High tides along the beaches vary.
   [uncountable] High tide is at 6 p.m.

WordReference Random House Unabridged Dictionary of American English © 2025

high′ tide′, 

1. Oceanography the tide at its highest level of elevation.
2. the time of high water.
3. a culminating point:
   the high tide of the revolution.
• bef. 1000; Middle English; Old English

Collins Concise English Dictionary © HarperCollins Publishers::

high tide noun

1. the tide at its highest level
2. a culminating point