From Longman Dictionary of Contemporary Englishpack up phrasal verb1 to put things into cases, bags etc ready for a trip somewhere Most of the holidaymakers had packed up and gone.pack something ↔ up I gave her a hand packing up her clothes and stuff.2 pack something ↔ up to put something into a box or other container, so that it can be moved, sold, or stored Don’t worry. The removal men will pack everything up.3 informalBFINISH DOING something to finish work at the end of the day ‘What time do you pack up?’ ‘Oh, about six.’4 British English informalTBROKEN if a machine packs up, it stops working because there is something wrong with it SYN pack in The photocopier’s packed up again.5 BELEAVE A JOB OR ORGANIZATION pack something ↔ up British English informal to stop doing something, especially a job He packed up his teaching job after only three months. → pack→ See Verb table
Examples from the Corpus
pack up• They won't know what to do if a pipe bursts or if the heater packs up.• Everyone packed up and went home.• When this record player packs up, I'll buy a CD player.• OK, guys - it's time to pack up now.From Longman Business Dictionarypack up phrasal verb [intransitive] British English informal1if a machine or piece of equipment packs up, it stops workingAll the computers packed up, so we couldn’t do any work.2to stop working, trading etcThe market collapsed and the company packed up and moved into something else. → pack→ See Verb table 