Definition of phantoms:
(n) :
A ghost or apparition.
(n) :
Something apparently seen, heard, or sensed, but having no physical reality; an image that appears only in the mind; an illusion or delusion.
(adj) :
Fictitious or nonexistent.
(adj) :
Illusive.
(n) :
(bridge) A placeholder for a pair of players when there are an odd number of pairs playing.
(n) :
(medical imaging) A test object that reproduces the characteristics of human tissue.