ICENI Meaning of ICENI in English [ ʌɪ'si:ni , -nʌɪ ]■ plural noun a tribe of ancient Britons inhabiting an area of SE England in present-day East Anglia, whose queen was Boudicca (Boadicea).Originfrom L. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004