uncountable - Simple English Wiktionary

un- + countable

• IPA ^(key): /ʌnˈkaʊntəbəl/

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• Hyphenation: un‧count‧able

1. (grammar) A word is uncountable if it means something that there is not a set number of. This usually means that it names a substance like water or wood. Uncountable words are sometimes called mass nouns, and they cannot be plural.
   • Antonym: countable