uncountably adverb3 •In an uncountable fashion.Some nouns can be used both countably and uncountably. •In a way that is incapable of being put into one-to-one correspondence with the natural numbers or any subset thereof.If a set is neither finite nor countably infinite, it is said to be uncountably infinite or simply uncountable. — 2004 •Too many to be counted (either by reason of being infinite or for practical constraints).The stars in the sky are uncountably many. Even a lifetime would not suffice to number them all.