Definitions of uncountable:
- adjective: So many as to be incapable of being counted.
- adjective: (mathematics) Incapable of being put into one-to-one correspondence with the natural numbers or any subset thereof.
- adjective: (grammar, of a noun) That cannot be used freely with numbers or the indefinite article, and therefore usually takes no plural form. Example: information.
- noun: (grammar) An uncountable noun.
(Definitions from Wiktionary)
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