involution (Noun) — Reduction in size of an organ or part (as in the return of the uterus to normal size after childbirth).
involution (Noun) — A long and intricate and complicated grammatical construction.
involution (Noun) — Marked by elaborately complex detail.
involution (Noun) — The act of sharing in the activities of a group. ex. "the teacher tried to increase his students' involution in class activities"
involution (Noun) — The action of enfolding something.
involution (Noun) — (maths) an operation that is its own inverse.
involution (Noun) — The process of raising a quantity to some assigned power.