- the act of involving or complicating or the state of being involved or complicated
- something involved or complicated
- degeneration or structural deformation
- an involute formation or structure
- reduction in size of an organ or part, as of the uterus following childbirth or as a result of ageing
- an algebraic operation in which a number, variable, expression, etc, is raised to a specified power
Compare evolution
WordReference Random House Unabridged Dictionary of American English © 2026
in•vo•lu•tion
(in′və lo̅o̅′shən),USA pronunciation n.
- an act or instance of involving or entangling;
involvement. - the state of being involved.
- something complicated.
- Zoology[Bot., Zool.]
- Botanya rolling up or folding in upon itself.
- Botanya part so formed.
- Developmental Biology[Biol.]retrograde development;
degeneration. - Physiologythe regressive changes in the body occurring with old age.
- Grammara complex construction in which the subject is separated from its predicate by intervening clauses or phrases.
- Mathematicsa function that is its own inverse.
- Medieval Latin involūtiōn- (stem of involūtiō). See involute, -ion
- 1605–15
Collins Concise English Dictionary © HarperCollins Publishers::
involution /ˌɪnvəˈluːʃən/ n
'involution' also found in these entries (note: many are not synonyms or translations):