c. 1500, "unclosing" (of Heaven), from Anglo-French aparicion, Old French apparition, aparoison (15c.), used in reference to the Epiphany (revealing of Christ child to the Wise Men), from La [..]

ghost, or supernatural appearance of a person or thing.

n. Ghost.

A supernatural appearance of a person or thing, esp. a ghost; a specter or phantom; wraith (Webster's Encyclopedic Unabridged Dictionary of the English Language, Thunder Bay Press, San Diego, CA [..]

n. 1. a visual illusion that results from the distortion of a perceived object of some kind. Often interpreted as threatening, apparitions may be associated with a neurological disorder, psychosis, or [..]

Take unusual care of all depending upon you. Calamity awaits you and yours. Both property and life are in danger. Young people should be decidedly upright in their communications with the opposite sex. Character is likely to be rated at a discount.   

"A specter of phantom. The act of appearing."

(n) a ghostly appearing figure(n) the appearance of a ghostlike figure(n) something existing in perception only(n) an act of appearing or becoming visible unexpectedly

1. The act of becoming visible; appearance; visibility. "The sudden apparition of the Spaniards." (Prescott) "The apparition of Lawyer Clippurse occasioned much speculation in that portion of the world." (Sir W. Scott) 2. The thing appearing; a visible object; a form. "Which apparition, it seems, was you." (Tatler) 3. [..]

is the appearance or time when a comet is visible such as Halley’s Comet.

A or ghost or something strange that appears