(senseid) Capable of being counted; having a quantity.
(ant)
(senseid) Finite or infinite; having a one-to-one correspondence (bijection) with a subset of the numbers.
(hyper)
(senseid) infinite|Countably infinite; having a bijection with the numbers.
(syn)
(senseid) Freely usable with the article and with numbers.
(quote-journal)
(senseid) A noun that is countable.