'Weatherliness' definitions:

Definition of 'weatherliness'

(from WordNet)
noun
(of a sailing vessel) the quality of being able to sail close to the wind with little drift to the leeward (even in a stiff wind); "the Spanish ships had superior speed and weatherliness"

Definition of 'Weatherliness'

From: GCIDE
  • Weatherliness \Weath"er*li*ness\, n. (Naut.) The quality of being weatherly. [1913 Webster]