Sinhalese /sɪnhəˈliːz/noun 2adjective 1forms 2 noun2 •A Sinhalese person: a member of the majority ethnic group of Sri Lanka. •The Indo-Aryan language of the Sinhalese people. adjective1 •Of or pertaining to the majority ethnic group of Sri Lanka, their Indo-Aryan language, or their culture. formsmore Sinhalese · most Sinhalese