Originally: that searches, examines vigorously or severely, or penetrates the soul. Later: characterized by or engaging in soul-searching; examining…

That rigorously examines, or causes a person to examine, the feelings or conscience. Also (now chiefly): characterized by such examination. Cf. soul…

Given to, characterized by, or involving examination of one's motives, thoughts, feelings, etc.; that engages in introspection.

Of the mind or thought: Directed inwards upon itself, or upon that which is inward or spiritual. Also transferred of a person: Given to…