Waterline

Pronunciation: /ˈwɔtˈɝɫaɪn/

Waterline (noun)

  1. The line where water meets air on the surface of something, showing how high the water level is.
  2. A marked line on a ship that shows the maximum safe depth of water for safe travel.
  3. A visible boundary showing the height of water inside a container or system.

Examples

  • The waterline moved after the rain stopped.
  • We marked the waterline to track the change.