Introspective

1. (a.) Inspecting within; seeing inwardly; capable of, or exercising, inspection; self-conscious.

2. (a.) Involving the act or results of conscious knowledge of physical phenomena; -- contrasted with associational.

Thesaurus Entries

absorbed, abstracted, buried in thought, cogitative, cognitive, concentrating, concentrative, conceptive, conceptual, conceptualized, contemplating, contemplative, deliberating, deliberative, engaged in thought, engrossed, engrossed in thought, excogitating, ideative, immersed in thought, lost in thought, meditating, meditative, mental, museful, musing, noetic, occupied, pensive, pondering, prehensive, preoccupied, rapt, reflecting, reflective, ruminant, ruminating, ruminative, serious, sober, speculative, thinking, thought, thoughtful, wistful, wrapped in thought