watertight
adjective
wa·ter·tight
ˌwȯ-tər-ˈtīt 
ˌwä-
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
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
Flooding concerns were also addressed, with the company explaining that its tunnels are designed to be watertight.
—
Hadley Hitson, Nashville Tennessean, 29 Sep. 2025
The deal is not yet watertight and needs to be implemented by individual members.
—Mike O'Sullivan, Forbes.com, 7 Aug. 2025
The shells, which are watertight and surprisingly sturdy, usually can be completed for a project in 24 hours.
—Sam Lubell, Los Angeles Times, 9 May 2025
Subjected to an almost watertight international arms embargo, Iran was forced to rely mostly on self-sufficiency, religious zeal, and patriotism.
—Foreign Affairs, 25 Feb. 2025
See All Example Sentences for watertight
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Hadley Hitson, Nashville Tennessean, 29 Sep. 2025
The deal is not yet watertight and needs to be implemented by individual members.
—Mike O'Sullivan, Forbes.com, 7 Aug. 2025
The shells, which are watertight and surprisingly sturdy, usually can be completed for a project in 24 hours.
—Sam Lubell, Los Angeles Times, 9 May 2025
Subjected to an almost watertight international arms embargo, Iran was forced to rely mostly on self-sufficiency, religious zeal, and patriotism.
—Foreign Affairs, 25 Feb. 2025
See All Example Sentences for watertight
Cite this Entry
“Watertight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watertight. Accessed 31 Oct. 2025.
Copy CitationKids Definition
watertight
adjective
wa·ter·tight
ˌwȯt-ər-ˈtīt
ˌwät-
1
: made to keep water out
a watertight compartment
2
: allowing no possibility for doubt or uncertainty
a watertight case against the accused
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