From Longman Dictionary of Contemporary EnglishBlack FridayˌBlack ˈFriday 1 the day after Thankgiving in the US, when stores open early and prices are reduced. Black Friday is one of the busiest shopping days of the year 2 Friday September 24,1869, when a group of investors tried to take control of the US gold market and caused a recession3 any Friday when something bad happens Employees refer to the day when the job cuts were announced as “Black Friday”.From Longman Business DictionaryBlack FridayˌBlack ˈFriday noun [uncountable]1FINANCEFriday September 24,1869, when a group of investors tried to take control of the US gold market and were considered to have caused a RECESSION2any Friday when something bad happensThe latest cuts at the organization were made on what staffers referred to as Black Friday.