Waterfast

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    watertight
  2. 2
    waterproof

    "If you spot paste, and your paper is waterfast, wipe at once with a damp cloth or sponge. If the paper is not waterfast, wipe with a dry cloth."

Synonyms

All synonyms
waterproofwatertight

Example

More examples

"If you spot paste, and your paper is waterfast, wipe at once with a damp cloth or sponge. If the paper is not waterfast, wipe with a dry cloth."

Etymology

From water + fast. Cognate with Scots wattirfast (“watertight”), West Frisian wetterfêst (“waterproof”), Dutch watervast (“waterproof”), German wasserfest (“waterproof”), Danish vandfast (“waterproof”), Swedish vattenfast (“waterproof”).

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