Noah Webster's Dictionary 1. (n.) The next in order after seventy-ninth. 2. (a.) Consisting of one of eighty equal parts or divisions. 3. (n.) The quotient of a unit divided by eighty; one of eighty equal parts.

Multi-Version Concordance Eightieth (1 Occurrence) 1 Kings 6:1 It happened in the four hundred and eightieth year after the children of Israel were come out of the land of Egypt, in the fourth year of Solomon's reign over Israel, in the month Ziv, which is the second month, that he began to build the house of Yahweh. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)