masc. proper name, name of a biblical prophet, from Hebrew Yesha'yah, abbreviated form of Yesha'yahu, literally "salvation of the Lord," from yesha, yeshua "salvation, deliverance."
A major Israelite prophet who foretold the coming of the Messiah; the Book of Isaiah in the Old Testament is attributed to him. In the New Testament, his prophecies are treated as predictions of many of the details of the life and death of Jesus. (See Good Shepherd.)