Pensive

a.	1.	Thoughtful, sober, or sad; employed in serious reflection; given to, or favorable to, earnest or melancholy musing. The pensive secrecy of desert cell. - Milton. Anxious cares the pensive nymph oppressed. - Pope.
	2.	Expressing or suggesting thoughtfulness with sadness; as, pensive numbers.

Adj.	1.	pensive - persistently or morbidly thoughtful Synonyms: contemplative, meditative, musing, pondering, reflective, ruminative, brooding, broody
	2.	pensive - showing pensive sadness; "the sensitive and wistful response of a poet to the gentler phases of beauty" Synonyms: wistful

absent, absentminded, absorbed, abstracted, atrabiliar, atrabilious, bemused, blue, brooding, castle-building, cogitative, cognitive, concentrating, concentrative, conceptive, conceptual, conceptualized, contemplating, contemplative, daydreaming, daydreamy, deliberating, deliberative, dreaming, drowsing, ecstatic, elsewhere, engrossed, excogitating, faraway, funky, grave, half-awake, ideative, in a reverie, in a trance, in the clouds, lost, lost in thought, meditating, melancholic, melancholy, mental, mooning, moonraking, museful, musing, napping, nodding, noetic, oblivious, pipe-dreaming, pondering, prehensive, preoccupied, rapt, reflecting, ruminant, ruminating, ruminative, sad, saddened, serious, sober, somewhere else, speculative, stargazing, taken up, thinking, thought, transported, tristful, unconscious, wistful, withdrawn, woolgathering, wrapped in thought