1. (n.) Complication; involvement; intricacy; entanglement; complexity\; or enfolding.

2. (n.) The state of being entangled or involved; complication; entanglement.

3. (n.) That in which anything is involved, folded, or wrapped; envelope.

4. (n.) The insertion of one or more clauses between the subject and the verb, in a way that involves or complicates the construction.

5. (n.) 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.

6. (n.) 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.

7. (n.) The return of an enlarged part or organ to its normal size, as of the uterus after pregnancy.

absorption addition ambages anfractuosity approximation circuitousness circumambages circumbendibus circumlocution circumvolution comedown complexity complexness complication convolution crabbedness crinkle crinkling debasement decadence decadency declension declination decline deformation degeneracy degenerateness degeneration degradation demotion depravation depravedness depreciation derogation descent deterioration devolution differentiation division downtrend downturn downward mobility downward trend drop dying ebb effeteness embarrassment engagement enmeshment entanglement equation evolution extrapolation fading failing failure failure of nerve fall falling-off flexuosity flexuousness implication inclusion integration interpolation intorsion intricacy intricateness inversion involvement lapse loss of tone meander meandering multiplication notation perplexity practice proportion ramification reduction regression relation retrocession retrogradation retrogression rivulation sinuation sinuosity sinuousness slinkiness slippage slump snakiness subtlety subtraction tanglement technicality torsion tortility tortuosity tortuousness transformation turning twisting undulation wane wave waving winding