Definition of involution
1 a (1)
:the act or an instance of enfolding or entangling :involvement
(2)
:an involved grammatical construction usually characterized by the insertion of clauses between the subject and predicate
b
:complexity, intricacy
3 a
:an inward curvature or penetration
b
:the formation of a gastrula by ingrowth of cells formed at the dorsal lip
4
:a shrinking or return to a former size
5
:the regressive alterations of a body or its parts characteristic of the aging process
- skeletal involution due to loss of estrogens at menopause
