Definition of "Zip" :

noun: a fastener for locking together two toothed edges by means of a sliding tab

noun: forceful exertion

"He's full of zip."

noun: a code of letters and digits added to a postal address to aid in the sorting of mail

noun: a quantity of no importance

verb: close with a zipper

"Zip up your jacket--it's cold."

verb: move very fast

"The runner zipped past us at breakneck speed."