< Japanese, equivalent to nin- endure + -jutsu technique; see ninja
[nin-juh] /ˈnɪn dʒə/
noun, plural ninja, ninjas.
(often initial capital letter) a member of a feudal Japanese society of mercenary agents, highly trained in martial arts and stealth (ninjutsu) who were hired for covert purposes ranging from espionage to sabotage and assassination.
a person who is expert or highly skilled in a specified field or activity (often used attributively):
marketing ninjas; ninja gamers.
< 1960-65;Japanese, equivalent to nin- endure + -ja, combining form of -sha person (< Middle Chinese, equivalent to Chineserěn + zhě)