Pensiveness
Pronunciation : Pen"sive*ness
Part of Speech : n.
Definition : Defn: The state of being pensive; serious thoughtfulness; seriousness. Hooker.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder