wa·​ter·​tight ˌwȯ-tər-ˈtīt How to pronounce watertight (audio)
: of such tight construction or fit as to be impermeable to water except when under sufficient pressure to produce structural discontinuity
: 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 This is literally making sure the car is watertight and noise proof because sealing also stops noise getting in. WIRED, 15 June 2023 Read the fine print before buying, as most are not watertight and will be destroyed by too much moisture. Lorraine Wilde, Treehugger, 7 June 2023 This sizable sedan can also turn in a circle of less than 35 feet, and its longish tail provides a 17-cubic-foot trunk that also contains a pass-through to the rear seat with a watertight ski bootie. Larry Griffin, Car and Driver, 7 Aug. 2023 Bisque pieces are not watertight and might leak if left full of water for long periods. Lauren Bengtson, Better Homes & Gardens, 10 Aug. 2023 Churchill cautions that the findings are not watertight, due to the small sample sizes in this study. Connor Lynch, Discover Magazine, 29 Dec. 2022 But the Russians’ own intentions may not be watertight, according to some of the documents which disclose US penetration of Russian military communications. Tim Lister, CNN, 16 Apr. 2023 The basement spaces are not watertight. Justin Beal, Curbed, 11 Sep. 2021 What to Consider: Not all of the zippers are watertight. Lydia Price, Travel + Leisure, 25 Jan. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'watertight.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

15th century, in the meaning defined at sense 1

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

Dictionary Entries Near watertight

Cite this Entry

“Watertight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watertight. Accessed 20 Jun. 2024.

Kids Definition


wa·​ter·​tight ˌwȯt-ər-ˈtīt How to pronounce watertight (audio)
: made to keep water out
a watertight compartment
: allowing no possibility for doubt or uncertainty
a watertight case against the accused

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