New Defender's Study Bible Notes
1:23 a virgin. This is a quotation from Isaiah 7:14, the great prophecy of the virgin birth. The Greek word for “virgin” is parthenos, which never has any other meaning. The Hebrew word is almah, and there has been some unjustified controversy as to whether this word also has only this meaning. Its quotation here by Matthew using parthenos, guided by divine inspiration, settles this question. Isaiah prophesied the virgin birth (or better, the miraculous conception) of Jesus, and Matthew records the fulfillment.