a fastener for locking together two toothed edges by means of a sliding tab;
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";
close with a zipper; "Zip up your jacket--it''s cold";
move very fast; "The runner zipped past us at breakneck speed";
