Definition of melancholiness in English:

melancholiness

Pronunciation /ˈmɛlənk(ə)lɪnɪs/ /ˈmɛləŋk(ə)linɪs/

noun

  • The condition of being melancholy; a tendency towards melancholy.

Origin

Early 16th century; earliest use found in Thomas Paynell (d. ?1564), translator. From melancholy + -ness.