'Unfriendliness' definitions:

Definition of 'unfriendliness'

From: WordNet
noun
Dislike experienced as an absence of friendliness [ant: friendliness]
noun
An unfriendly disposition [ant: friendliness]

Definition of 'Unfriendliness'

From: GCIDE
  • Unfriendly \Un*friend"ly\, a.
  • 1. Not friendly; not kind or benevolent; hostile; as, an unfriendly neighbor. [1913 Webster]
  • 2. Not favorable; not adapted to promote or support any object; as, weather unfriendly to health. [1913 Webster] -- {Un*friend"li*ness}, n. [1913 Webster]