<p><strong>Noun</strong></p><ul><li>an act or instance of involving or entangling; involvement</li><li>the state of being involved</li><li>something complicated</li><li>Mathematics: a function that is its own inverse</li><li>Botany, Zoology: a rolling up or folding in upon itself</li><li>a part so formed</li><li>Biology: retrograde development; degeneration</li><li>Physiology: regressive changes in the body, as those occurring with old age</li><li>Anthropology, Sociology: growth without evolution, as in a growing agrarian society with increased field labor whose production mechanisms become more complex without increasing yield; diminishing returns</li><li>Grammar: a complex construction in which the subject is separated from its predicate by intervening clauses or phrases</li></ul>