A twist or fold.
Any of the folds on the surface of the brain.
The shape of something rotating; a vortex.
State or condition of being convoluted.
A form of moving average.
A function which maps a tuple of sequences into a sequence of tuples.
One 360° turn in a spring or similar helix. A keyring contains 2 convolutions.
The high-pitched sound of a small object moving rapidly through air.
Energy; vigor; vim.
A zip fastener.
Zero; nothing.
I know zip about economics.
A trip on a zipline.
A zip file.
An ounce of marijuana.
A ZIP code; a US postal code.
(by extension) Any postal code, for any country.