Is

King James Dictionary

Is, iz. L. est. The third person singular of the substantive verb, which is composed of three or four distinct roots, which appear in the words am, be, are, and is. Is and was coincide with the Latin esse, and Goth.wesan. In the indicative, present tense, it is thus varied I am, thou art, he, she, or it, is we, ye or you, they, are. In writing and speaking, the vowel is often dropped as, he's gone there's none left.

Webster's Dictionary

(v. i.) The third person singular of the substantive verb be, in the indicative mood, present tense; as, he is; he is a man. See Be.