flourishing UK /ˈflʌɹɪʃɪŋ/US /ˈflɝɪʃɪŋ/noun 5adjective 1forms 3 noun5 •An act or instance of thriving or flowering. •A period of greatest influence. •A bold, sweeping movement. •The brandishing of a weapon. •A boasting or bragging. adjective1 •Growing, thriving, prospering. formsflourishings · more flourishing · most flourishing