1. to keep or save something to use or deal with at a later time
set aside some time for discussion
If you 'set' or 'put something aside', you keep it or store it to come back to it at a later time. You might set or put something aside in order to save it for later or to preserve it, or because you don't want to deal with it now and wish to address it later on. These are both popular phrasal verbs used in many different contexts, social or professional.