Dictionary.com
Thesaurus.com
Synonyms

watertight

American  
[waw-ter-tahyt, wot-er-] / ˈwɔ tərˌtaɪt, ˈwɒt ər- /

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.


watertight British  
/ ˈwɔːtəˌtaɪt /

adjective

  1. not permitting the passage of water either in or out

    a watertight boat

  2. without loopholes

    a watertight argument

  3. kept separate from other subjects or influences

    different disciplines are often thought of in watertight compartments

"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

Other Word Forms

  • nonwatertight adjective
  • watertightness noun

Etymology

Origin of watertight

Middle English word dating back to 1350–1400; water, tight

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Kate says her home insurance company wouldn't pay out because the property had not been watertight.

From BBC

Tsui said he followed the inquest with "incredulity" as one witness after another dodged responsibility for the missing watertight door, a fault traced back to the ship's origin at a local shipyard.

From Barron's

Extent of the flooding if the bulkhead had been watertight.

From Barron's

While last Saturday's 2-2 draw may have put a small dent in Arsenal's Premier League title charge, their four-point lead at the top of the table has undoubtedly been built on a watertight defence.

From BBC

The comforting, murmuring sound was like the lap of waves against the hull of a watertight ship, and she slept as well as she ever had in her life.

From Literature