Future (?; 135), a. [F. futur, L. futurus, used as fut. p. of esse to be, but from the same root as E. be. See Be, v. i.] That is to be or come hereafter; that will exist at any time after the present; as, the next moment is future, to the present.
[1913 Webster]

Future tense (Gram.), the tense or modification of a verb which expresses a future act or event.
[1913 Webster]