'Unlike' definitions:

Definition of 'unlike'

From: WordNet
adjective
Marked by dissimilarity; "for twins they are very unlike"; "people are profoundly different" [syn: unlike, dissimilar, different] [ant: like, similar]
adjective
Not equal in amount; "they distributed unlike (or unequal) sums to the various charities" [ant: like, same]

Definition of 'Unlike'

From: GCIDE
  • Unlike \Un*like"\, a.
  • 1. Not like; dissimilar; diverse; having no resemblance; as, the cases are unlike. [1913 Webster]
  • 2. Not likely; improbable; unlikely. [Obsoles.] [1913 Webster]
  • Unlike quantities (Math.), quantities expressed by letters which are different or of different powers, as a, b, c, a^2, a^3, x^n, and the like.
  • Unlike signs (Math.), the signs plus (+) and minus (-). [1913 Webster]