"The "Son" of God is Jesus Christ, who was spiritually born of the knowledge of the Holy Spirit of God's Will, which He fulfilled perfectly, displaying with Himself the spiritual "Image" and "Likeness" of God the Father, thus becoming His spiritual "Son.  
"Son" is the image of a man who knows, accepts and does the Will of his Father, God, His Commandments, a follower of the righteous way of life of the Patriarchs, the Prophets, Jesus Christ, the Apostles. 
Negative meaning.
"Son" is a person "born" of a false faith, pernicious ideologies, sinful social patterns, a continuator of the sinful way of life of his predecessors.