Also found in: Dictionary, Thesaurus, Acronyms, Wikipedia.


(naval architecture)
The intersection of the surface of the water with the side of a ship.
A line painted on the hull of a ship showing the level of the water when the ship is properly trimmed.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(also shoreline), the line of contact between the water surface of a body of water—such as a lake, river, or sea—and a dry land surface, or shore. The height and shape of a waterline vary owing to fluctuations in the level and changes in the nature of the shore that result from erosion, abrasion, or human activity.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Inside a cistern, the highest water level to which the ball valve should be adjusted to shut off.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

waterline (WL)

waterline (WL)
A system of aircraft location designation. The water line is the measurement of height in inches perpendicular from a horizontal plane located a fixed number of inches below the bottom of the aircraft fuselage.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
To test, your office has two options: mail-in water test services and in-office waterline tests.
WaterLine comes to market just months after floods damaged homes and disrupted communities across the United States: from Dane County, Wisconsin, where emergency officials reported that just two percent of residential and business damage was insured against recent flooding, to Ellicott City, Maryland, which endured its second 1,000-year rain event in two years, according to the National Weather Service.
'Waterline is highly regarded for its holistic approach to wealth management, making it an excellent fit with Northern Trust's client-focused investment strategies,' he added.
[6] Topside: The outer sides of the hull between the waterline and the gunwale--not at all the same thing as the deck.
We have told the contractor to cease and desist with any additional waterline installation until the roadway surface is corrected to our satisfaction.
The Greenspoint Waterline and Grid Extension project is part of the City of Houston's Surface Water Transmission Program, and was adopted on a fast-track design and construction schedule to meet the January 2006 U.S.
None of her 16 opponents could get near Mick Channon's well-touted filly, but Waterline Twenty acquitted herself well in finishing seventh, some eight lengths behind the winner.
Had the mix-up not been discovered in time, the `ringer' might well have gone close as Kapaje had been due to run off a BHB mark of 65, which is 5lb lower than On The Waterline's all-weather rating.
The New Zealand has a 150-foot mast and is 90 feet long at waterline, the maximum length allowed by America's Cup rules and longer than any America's Cup boat since the dramatic "J-boats" of the 1930s.
Ahead of the opening of Cipriani's first-ever large-format culinary experience at Waterline Square this year, the development has added another celebrated restaurant to its lifestyle offering.