convolution

1. (countable, uncountable)A twist or fold.

   a convex fold or elevation in the surface of the brain

2. (countable, uncountable)Any of the folds on the surface of the brain.

3. (countable, uncountable)The shape of something rotating; a vortex.

   the shape of something rotating rapidly

4. (countable, uncountable)The state or condition of being convoluted.

5. (countable, uncountable)A mathematical operation on two functions that produces a third that expresses how the shape of one is modified by the other; the integral of the product of the two functions after one is reflected about the y-axis and shifted along the x-axis.

6. (countable, uncountable)A function which maps a tuple of sequences into a sequence of tuples.

7. (countable, uncountable)One 360° turn in a spring or similar helix.

regular