the act of involving or infolding.-the state of being entangled or involved; complication; entanglement.-that in which anything is involved, folded, or wrapped; envelope.-the insertion of one or more clauses between the subject and the verb, in a way that involves or complicates the construction.-the act or process of raising a quantity to any power assigned; the multiplication of a quantity into itself a given number of times; -- the reverse of evolution.-the relation which exists between three or more sets of points, a.a', b.b', c.c', so related to a point o on the line, that the product oa.oa' = ob.ob' = oc.oc' is constant. sets of lines or surfaces possessing corresponding properties may be in involution.-the return of an enlarged part or organ to its normal size, as of the uterus after pregnancy.