QC noun6 •Initialism of quality control. •(Canada) Abbreviation of Quebec: a province of Canada. •(Canada) Initialism of Quebec City: the capital of the province of Quebec, Canada. •(UK, Canada) Initialism of Queen's Counsel and postnominal. •(Philippines) Initialism of Quezon City: a city in Metro Manila, Philippines; the former capital of the Philippines. •Initialism of quick change: a type of aircraft that can be rapidly switched between passenger and cargo configurations. formsQCs