1. (Japanese) a class of 14th century Japanese who were trained in martial arts and were hired for espionage and assassinations
   "Legends of ninja stealth and cunning have persisted for centuries"
    
2. (Japanese) a member of the ninja who were trained in martial arts and hired for espionage, sabotage or assassinations; a person skilled in ninjutsu
   "The ninja silently infiltrated the enemy fortress"; "She moved with the stealth of a ninja"

Derived forms: ninjas

Type of: class, mercenary, social class, socio-economic class, soldier of fortune, stratum

Encyclopedia: Ninja, The Wonder Boy