I. ˌkänvəˈlüshən noun
( -s )
Etymology: Latin convolutus + English -ion
1.
a. : a tortuous or sinuous winding, fold or design (as of something rolled or folded upon itself) : coil , whorl , fold , sinuosity
the convolutions of the intestines
b. : one of the irregular ridges upon the surface of the brain, especially of the cerebrum, of some animals : gyrus
c. : twisting , winding : a complication or intricacy of form, design, or structure
as a lover, as a writer, as a soldier, as an aesthete, and as a public official his life was of an almost inconceivable convolution — Times Literary Supplement
2. : the act or action of convoluting or of following a convoluted course
o'er the sea in convolutions swift, the feathered eddy floats — James Thomson †1748
II. noun
: a function h ( y ) that for two given functions f and g is given by h(y) = ∫ a b f(y -x) g(x) dx where in various applications (as in finding the probability density function of the sum of two independent and continuous random variables) the lower limit of integration is taken as - ∞ or 0 and the upper limit is taken as + ∞ or the variable y — called also convolution integral