Definition of ghost

• n. - The spirit; the soul of man.
• n. - The disembodied soul; the soul or spirit of a deceased person; a spirit appearing after death; an apparition; a specter.
• n. - Any faint shadowy semblance; an unsubstantial image; a phantom; a glimmering; as, not a ghost of a chance; the ghost of an idea.
• n. - A false image formed in a telescope by reflection from the surfaces of one or more lenses.
• v. i. - To die; to expire.
• v. t. - To appear to or haunt in the form of an apparition.