waterline

noun

wa·​ter·​line ˈwȯ-tər-ˌlīn 

ˈwä-

: a line that marks the level of the surface of water on something: such as

a(1)

: the point on the hull of a ship or boat to which the water rises

(2)

: a line marked on the outside of a ship that corresponds with the water's surface when the ship is afloat on an even keel under specified conditions of loading

b

: shoreline sense 1

Examples of waterline in a Sentence

We repaired the hull below the waterline.

Recent Examples on the Web

For makeup, artist Raoul Alejandre drew black liner in Moore’s waterline, flushed her cheeks and dressed her lips in a pale pink hue. —Kaleigh Werner, Footwear News, 22 May 2026

After three years of closures due to waterline repairs, a more than 2,000-acre state park bordering Lake Tahoe has reopened just in time for Memorial Day weekend travel. —Sean Campbell, Sacbee.com, 22 May 2026

Deeper tones on the upper waterline can add definition, while a soft beige on the lower waterline can add brightness. —Loren Savini, Allure, 20 May 2026

Beatbot Sora 70 Robotic Pool Cleaner Deal The most impressive model that Beatbot has on offer during their sale is the Sora 70, an integrated unit that has cleaning systems for floor, walls, waterline, and surface, leaving no part of your pool untouched. —K. Thor Jensen, PC Magazine, 19 May 2026

Word History

First Known Use

circa 1625, in the meaning defined above

Phrases Containing waterline

• the waterline

Rhymes for waterline

• alkaline
• andesine
• anodyne
• anticline
• arginine
• asinine
• benzidine
• borderline
• byzantine
• calamine
• caroline
• centerline

Kids Definition

waterline

noun

wa·​ter·​line ˈwȯt-ər-ˌlīn 

ˈwät-

: a line marked on the outside of a ship that matches the surface of the water when the ship floats evenly