Definition of "uncountable"

So many as to be incapable of being counted.  examples

(mathematics) Incapable of being put into one-to-one correspondence with the natural numbers or any subset thereof.  examples

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

(grammar) An uncountable noun.  quotations  examples