NINJUTSU Meaning of NINJUTSU in English [ nɪn'dʒʌtsu: ]■ noun the traditional Japanese technique of espionage, characterized by stealth and camouflage.OriginJapanese, from nin 'stealth' + jutsu 'art, science'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004