Strong Definition:
From G4154; a current of air, that is, breath (blast) or a breeze; by analogy or figuratively a spirit, that is, (human) the rational soul, (by implication) vital principle, mental disposition, etc., or (superhuman) an angel, daemon, or (divine) God, Christ’s spirit, the Holy spirit: - ghost, life, spirit (-ual, -ually), mind. Compare G5590.
Total KJV occurrences: 385

Thayer Definition:
1) the third person of the triune God, the Holy Spirit, coequal, coeternal with the Father and the Son
1a) sometimes referred to in a way which emphasises his personality and character (the \\Holy\\ Spirit)
1b) sometimes referred to in a way which emphasises his work and power (the Spirit of \\Truth\\)
1c) never referred to as a depersonalised force
2) the spirit, i.e. the vital principal by which the body is animated
2a) the rational spirit, the power by which the human being feels, thinks, decides
2b) 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
3a) a life giving spirit
3b) a human soul that has left the body
3c) a spirit higher than man but lower than God, i.e. an angel
3c1) used of demons, or evil spirits, who were conceived as inhabiting the bodies of men
3c2) 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
4a) the efficient source of any power, affection, emotion, desire, etc.
5) a movement of air (a gentle blast)
5a) of the wind, hence the wind itself
5b) breath of nostrils or mouth
Part of Speech: noun neuter
A Related Word by Thayer’s/Strong’s Number: from G4154
Citing in TDNT: 6:332, 876