Isaiah 7:14 (KJV) reads, "Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel." The phrase from Hebrew translated "a virgin" is in hebrew "haa' almaah." My question is this: This word (in my limited understanding) can mean a young woman or a virgin. And in the KJV, it has been used in other places to mean "damsel," "maid," or "virgin." How do we know that "a virgin" is the intended use here? Is it because of the corroboration of the New Testament, Mary being a virgin?