waterline

Meanings

1. 1
   noun

   the level reached by water on the side of a floating vessel, or a line marking that level

   The damaged steamer settled until its deck was almost at the waterline.

2. 2
   noun

   the boundary where a body of water meets land or another surface

   Reeds grew thickly along the lake's waterline.

3. 3
   noun

   especially in North America, a pipe or system that carries a water supply

   Workers replaced the cracked waterline beneath the road.

A compound of water + line, recorded for the line made by the surface of water against a ship's hull. It later broadened to boundaries left by water and, especially in North American use, pipes carrying a water supply.

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