What is spirit?

Spirit in Greek is pneuma.

It is translated as Spirit (111x), Holy Ghost (89x), Spirit (of God) (13x), Spirit (of the Lord) (5x), (My) Spirit (3x), Spirit (of truth) (3x), Spirit (of Christ) (2x), human (spirit) (49x), (evil) spirit (47x), spirit (general) (26x), spirit (8x), (Jesus’ own) spirit (6x), (Jesus’ own) ghost (2x).

Definitions of pneuma:

1. the third person of the triune God, the Holy Spirit, coequal, coeternal with the Father and the Son
– sometimes referred to in a way which emphasises his personality and character (the “Holy” Spirit)
– sometimes referred to in a way which emphasises his work and power (the Spirit of “Truth”)
– never referred to as a depersonalised force
2. the spirit, i.e. the vital principal by which the body is animated
– the rational spirit, the power by which the human being feels, thinks, decides
– the soul
3. a spirit, i.e. a simple essence, devoid of all or at least all grosser matter, and possessed of the power of knowing, desiring, deciding, and acting
– a life giving spirit
– a human soul that has left the body
– a spirit higher than man but lower than God, i.e. an angel
– used of demons, or evil spirits, who were conceived as inhabiting the bodies of men
– the spiritual nature of Christ, higher than the highest angels and equal to God, the divine nature of Christ
4. the disposition or influence which fills and governs the soul of any one
– the efficient source of any power, affection, emotion, desire, etc.
5. a movement of air (a gentle blast)
– of the wind, hence the wind itself
– breath of nostrils or mouth

https://www.blueletterbible.org/lang/le … 4151&t=KJV

1. air
2. wind
3. breath
4. (phonology) breathing
5. life
6. spirit, soul
7. spiritual being: spirit, angel
8. inspiration (often divine inspiration), genius

https://en.wiktionary.org/wiki/%CF%80%C … E%BC%CE%B1