a definition

• a definite area of shade cast upon a surface by a body intercepting the light rays
• the dark image made by such a body
• the growing darkness after sunset
• a feeling of gloom or depression, a suggestion of doubt, etc.
• anything causing gloom, doubt, etc.
• a shaded area in a picture or X-ray
• a dark area, as of a very short growth of beard
• a mirrored image; reflection
• something without reality or substance; imaginary vision
• a ghost; apparition
• a vague indication or omen; prefiguration coming events cast their shadows before
• a faint suggestion or appearance; trace not a shadow of hope
• remnant; vestige a mere shadow of his former self
• a close or constant companion
• a person who trails another closely, as a detective or spy