counterconvention

noun

coun·​ter·​con·​ven·​tion ˌkau̇n-tər-kən-ˈven(t)-shən 

variants or counter-convention

plural counterconventions or counter-conventions

: an assembly of persons gathered in response to or in protest against another assembly : a competing or opposing convention

Democrats who gathered Thursday for the Clinton campaign's counterconvention, less than a mile from the Republican National Convention site, blasted the event and vowed their convention next week in Philadelphia would have a kinder tone.

—Liz Goodwin

Word History

First Known Use

1756, in the meaning defined above