Below is the definition for the word you requested, useful for Scrabble and other word games. To find more definitions please use the dictionary page.
a fastener for locking together two toothed edges by means of a sliding tab
close with a zipper; "Zip up your jacket--it's cold"
a code of letters and digits added to a postal address to aid in the sorting of mail
move very fast; "The runner zipped past us at breakneck speed"
a quantity of no importance; "it looked like nothing I had ever seen before"; "reduced to nil all the work we had done"; "we racked up a pathetic goose egg"; "it was all for naught"; "I didn't hear zilch about it"
This is a way of compressing files so they take up less room and màke transferring data quicker