WordWeb Online

1. Marked by dissimilarity
   "for twins they are very unlike"
    
2. Not equal in amount
   "they distributed unlike (or unequal) sums to the various charities"

1. In contrast to
   "he's very friendly, unlike his father"
    
2. Not similar to, different from
   "the new one is quite unlike the old one"
    
3. Not typical of
   "most unlike her to be late"

See also: one-sided, unequal

Antonym: same, similar