The term Godhead refers to the divine nature, essence, or fullness of God. It does not refer to multiple persons. It refers to who God is in His divine being.
The word “Godhead” appears three times in Scripture:
Acts 17:29 — “Godhead” = divine nature
Romans 1:20 — “Godhead” = divine attributes
Colossians 2:9 — “Godhead” = divine fullness
In every case, the Godhead refers to one God, not a plurality.