Smith's Bible Dictionary
Angel of the Lord(Genesis 16:7) etc. (The special form in which God manifested himself to man, and hence Christ's visible form before the incarnation. Compare (Acts 7:30-38) with the corresponding Old-Testament history; and (Genesis 18:1,13,14,33) and Genesis 19:1)
ATS Bible Dictionary
Angel of the LordThe Angel Jehovah, the usual title of Christ in the Old Testament. Compare Genesis 16:7-13; 22:11-18; 31:11-13; 32:24-30; Exodus 3:2-6,14; 23:20; Jud 2:1-23; 13:16-22; Acts 7:30-38. Christ thus appears in the Patriarchal, the Mosaic, and the Christian dispensation as the same Jehovah, revealing the Father to men, and carrying forward the same great plan for the redemption of his people, Isaiah 63:9.