'Ghost' in the Bible

I indeed have baptized you with water: but he shall baptize you with the Holy Ghost.

But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation:

When they saw Him walking on the sea, they thought it was a ghost and cried out;

For David himself said by the Holy Ghost, The LORD said to my Lord, Sit thou on my right hand, till I make thine enemies thy footstool.

But when they shall lead you, and deliver you up, take no thought beforehand what ye shall speak, neither do ye premeditate: but whatsoever shall be given you in that hour, that speak ye: for it is not ye that speak, but the Holy Ghost.

And Jesus cried with a loud voice, and gave up the ghost.

And when the centurion, which stood over against him, saw that he so cried out, and gave up the ghost, he said, Truly this man was the Son of God.