From Longman Dictionary of Contemporary Englishzip up phrasal verbFASTEN/DO UPto fasten something using a zip, or to become fastened using a zip OPP unzip The dress zipped up at the front.zip something ↔ up He was zipping up a small brown suitcase.zip somebody up Could you zip me up (=fasten my dress) please? I can’t reach. → zip→ See Verb table
Examples from the Corpus
zip up• Can you zip my dress for me?• My sleeping bag was fully zipped up.• She took some money out of her purse and quickly zipped it up again.• Roger zipped up the battered black case he carried his guitar in.• I can't zip up these jeans - they're too tight. 