Cameroonian /ˌkæməˈɹuː.ni.ən/adjective 1noun 1forms 1 adjective1 •Of, from, or pertaining to Cameroon, the Cameroonian people or the Cameroonian language.In January, Boko Haram struck Fotokol, a Cameroonian town separated by only a bridge from Gambarou, Nigeria, a stronghold of the Islamist extremists. The attackers killed more than 400 people. — 2015 noun1 •A person from Cameroon or of Cameroonian descent.Nouma said he believes “most of the worst attacks we have suffered” were carried out by Cameroonians fighting for Boko Haram. — 2015 formsCameroonians