From Longman Dictionary of Contemporary Englishhang together phrasal verb1 ORGANIZEif a plan, story, set of ideas etc hangs together, it is well organized and its different parts go well together Her story just doesn’t hang together.2 HELPif people hang together, they help each other → hang→ See Verb table
Examples from the Corpus
hang together• Is there any mechanism to make a particular committee hang together?• None of it hangs together, and I can't think what's happening.• The idea was to hang together, keep in touch with the audience and maybe make a few bucks.• The elements in this mixture barely seem to hang together; or rather, radical disjunctions are part of the effect.• But will the coalition hang together until then?• Her story doesn't hang together very well.• This was an exhibition with great intent but as a whole, it did not hang together well. 