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Day of the Lord

noun

Also called Day of Yahweh. (in Old Testament eschatology) a day of final judgment. Amos 5:18–21; Ezek. 30.

Also called Day of Christ, Day of Jesus Christ. the day of the Second Advent. II Peter 3:10; I Cor. 1:14; Phil. 1:10, 2:16.

Origin of Day of the Lord

Middle English word dating back to 1350–1400