# high-water mark

> English word · Noun

## Definitions
1. A mark, such as a line of seaweed, showing the highest level reached by a body of water.
2. The peak, apex or acme of something; the maximum level; the furthest or highest point.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/high-water-mark