Millo (mĭl'lo), a mound, rampart. "Millo" is used for a part of the citadel of Jerusalem, probably the rampart, or entrenchment. 2 Samuel 5:9, 1 Kings 1:9-24, 1 Kings 11:27, 1 Chronicles 11:8. The same, or part of it, was probably the "house of Millo;" margin "Beth Millo." 2 Kings 12:20, 2 Chronicles 32:5. Some think it means the "stronghold of Zion."