Boyd’s Bible Dictionary:
The Supreme Being in all his nature and attributes
(Acts 17:29; Rom. 1:20; Col. 2:9).
Concise Bible Dictionary:
1. θεῖος, that which is “divine:” it is not like gold, silver, or stone (Acts 17:29). The word is translated “divine” in 2 Pet. 1:3,4.
2. θειότης, that which is characteristic of God, namely, “divinity” (Rom. 1:20).
3. θεότης, Deity or Godhead; in Christ “dwells all the fullness of the Godhead bodily” (Col. 2:9).