verb
-sists; -sisted; -sisting
to demand that something happen or that someone do something [no obj]
usually + that
[+ obj] :to say (something) in a way that is very forceful and does not allow disagreement
usually + that
insist on
also insist upon
[phrasal verb]
insist on/upon (something) or insist on/upon doing (something) :to say or show that you believe that something is necessary or very important
insist on/upon doing (something) informal :to continue doing (something that other people think is annoying or unimportant)