The definition of uncanny refers to something odd, mysterious or unexpected that makes you feel uneasy.(adjective)
An example of uncanny is when someone looks almost exactly like your spouse.
See uncanny in Webster's New World College Dictionary
Origin: see un- & canny
See uncanny in American Heritage Dictionary 4
adjective un·can·ni·er, un·can·ni·est
Origin: + canny, fortunate, safe (obsolete).
Learn more about uncanny