The state of a body of water that has reached its highest level.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "high water" in a sentence
"I received information that Averill had started back on the same route he came, but was stopped by high water at Craig's Creek some twelve or fifteen miles from Salem."
"Survivors of Pickett's brigade and ex-Union troops from the Philadelphia Brigade Association formed two lines and walked fifty feet north and south to the wall on Cemetery Ridge which marked the so-called high water mark of the Confederacy."
"It was near high water when he reached the shore at Hengistbury Head."