(noun) a Japanese form of wrestling; you lose if you are forced out of a small ring or if any part of your body (other than your feet) touches the ground
Definitions for Ninja
(noun) a member of the ninja who were trained in martial arts and hired for espionage or sabotage or assassinations; a person skilled in ninjutsu
(noun) a class of 14th century Japanese who were trained in martial arts and were hired for espionage and assassinations