2.adjectiveSo many as to be incapable of being counted.
"The reasons for our failure were as uncountable as the grains of sand on a beach."
3.adjectiveIncapable 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."
4.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.
"Many languages do not distinguish countable nouns from uncountable nouns."