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watertight

[waw-ter-tahyt, wot-er-]
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adjective
  1. constructed or fitted so tightly as to be impervious to water: The ship had six watertight compartments.
  2. so devised or planned as to be impossible to defeat, evade, or nullify: a watertight contract; a watertight alibi.
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Origin of watertight

Middle English word dating back to 1350–1400; see origin at water, tight
Related formswa·ter·tight·ness, nounnon·wa·ter·tight, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for watertightness

Historical Examples

  • Again the work has to be done uniformly well, not only for appearance sake but because of the necessity of watertightness.

    Concrete Construction

    Halbert P. Gillette

  • Exceptionally good concreting is essential in tank work if watertightness is to be secured.

    Concrete Construction

    Halbert P. Gillette


British Dictionary definitions for watertightness

watertight

adjective
  1. not permitting the passage of water either in or outa watertight boat
  2. without loopholesa watertight argument
  3. kept separate from other subjects or influencesdifferent disciplines are often thought of in watertight compartments
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Derived Formswatertightness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for watertightness

watertight

adj.

late 14c., from water (n.1) + tight. Figurative use from 1640s.

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Online Etymology Dictionary, © 2010 Douglas Harper