"Immanuel" means "God with us"--that is, God incarnate in human flesh, the unique miracle implied by the Edenic promise of the conquering "Seed of the Woman" in Genesis 3:15. Men produce genetic seed naturally, but a woman could only generate a "seed" supernaturally. A true virgin conception has only occurred once in human history, leading to the birth of Christ. Christ as the God-man is the only one who could ever destroy the "old serpent, the devil" (Micah 5:2; John 1:14).

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8