1. the action of enfolding something

Synonym: enfolding

2. the process of raising a quantity to some assigned power

Synonym: exponentiation

3. the act of sharing in the activities of a group

e.g. the teacher tried to increase his students' engagement in class activities

Synonym: engagementparticipationinvolvement

4. marked by elaborately complex detail

Synonym: elaboratenesselaborationintricacy

5. a long and intricate and complicated grammatical construction

6. reduction in size of an organ or part (as in the return of the uterus to normal size after childbirth)