set up is a verb meaning "set up or found". It carries 15 recorded senses.
put into a proper or systematic order
“arrange the books on the shelves in chronological order”
begin, or enable someone else to begin, a venture by providing the means, logistics, etc.
“set up an election”
produce
“The scientists set up a shock wave”
make ready or suitable or equip in advance for a particular purpose or for some use, event, etc
“Get the children ready for school!”
“prepare for war”
“I was fixing to leave town after I paid the hotel bill”
Definitions, synonyms and semantic relations for set up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.