Watertight

//ˈwɔː.tə.taɪt// adj

adj ·Moderate ·College level

Definitions

Adjective
  1. 1
    So tightly made that water cannot enter or escape.

    "What a day, eh? Demmy, it's like the commencement of the rainy season in Bengal. But you'll find my carriage is watertight. Come along, my mother and Emmy are in the vestry."

  2. 2
    So devised or planned as to be impossible to defeat, evade or nullify. figuratively

    "a watertight alibi"

Adjective
  1. 1
    without flaws or loopholes wordnet
  2. 2
    not allowing water to pass in or out wordnet

Synonyms

All synonyms
tightwaterproofairtightballproofboldbombproof

Example

More examples

"The rooftop is durable and watertight."

Etymology

From water + tight. Compare Scots wattirticht (“watertight”), West Frisian wetterticht (“waterproof”), Dutch waterdicht (“waterproof, watertight”), German wasserdicht (“watertight, waterproof”), Danish vandtæt (“watertight”), Swedish vattentät (“watertight, waterproof”).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.