noun

1. (grammar) An uncountable noun.

adjective

1. So many as to be incapable of being counted.

   “The reasons for our failure were as uncountable as the grains of sand on a beach.”

2. Incapable of being put into one-to-one correspondence with the natural numbers or any subset thereof.

   “Cantor’s “diagonal proof” shows that the set of real numbers is uncountable.”

3. (grammar, of a noun) That cannot be used freely with numbers or the indefinite article, and therefore usually takes no plural form. Example: information.

   “Many languages do not distinguish countable nouns from uncountable nouns.”

Synonyms: non-count, countless