wa·​ter·​tight | \ˌwȯ-tər-ˈtīt, ˌwä-\

Definition of watertight 

1 : of such tight construction or fit as to be impermeable to water except when under sufficient pressure to produce structural discontinuity

2 : leaving no possibility of misconstruction or evasion a watertight lease

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Other Words from watertight

watertightness noun

Examples of watertight in a Sentence

The doors are all watertight. The evidence against the defendant was watertight.

Recent Examples on the Web

Spearman's right hand was crushed by a sliding watertight door on the ship in 2008. Chabeli Herrera, miamiherald, "A door on a Royal Caribbean ship crushed her hand. She sued for $20.3 million — and won," 4 June 2018 The ripcord on one of the flares being carried over a crewman’s shoulder snagged on the edge of a watertight door. John Mccain, Popular Mechanics, "Fire on the Flight Deck," 22 Jan. 2018 Paul Daly, another Cambridge legal academic, believes the only legally watertight transition is to extend Article 50’s two-year deadline for Brexit. The Economist, "Imperfect panaceaA Brexit transition deal will be harder to reach than Britain thinks," 25 Oct. 2017 The explosion on the port side warped the bulkhead, preventing the crew from closing a watertight door, crippled both engines and disabled radio communication, preventing a distress call. Sam Roberts, New York Times, "99 Years Later, Navy Probing Warship Disaster Off Long Island," 10 Sep. 2017 The vessels are not watertight or pressurized, so a team of divers takes the pilots down, supplying them with air all the while. Jay Bennett, Popular Mechanics, "Welcome to the Preposterous World of Human-Powered Submarine Racing," 9 Aug. 2017 Watertight goggles are de rigueur when swimming, even in fresh water. Jane E. Brody, idahostatesman, "Take steps to minimize irritation from dry eyes," 4 Aug. 2017 Watertight goggles are de rigueur when swimming, even in fresh water. Jane E. Brody, New York Times, "Dry Eyes Deserve Attention," 31 July 2017 The ride-hailing apps that are disrupting travel in cities around the world have also disrupted the economics of what once seemed a watertight investment — a New York City taxi medallion. Washington Post, "Uber, Lyft take down not just cab drivers, but also lenders," 15 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'watertight.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of watertight

15th century, in the meaning defined at sense 1

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The first known use of watertight was in the 15th century

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More Definitions for watertight



English Language Learners Definition of watertight

: put or fit together so tightly that water cannot enter or pass through

: too strong or effective to fail or to be defeated


wa·​ter·​tight | \ˌwȯ-tər-ˈtīt, ˌwä-\

Kids Definition of watertight

: so tight as to be waterproof The pipe's joints are watertight.

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Comments on watertight

What made you want to look up watertight? Please tell us where you read or heard it (including the quote, if possible).


obstinately defiant of authority

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