First Known Use: 1964
Dictionary
ninja
noun nin·ja \ˈnin-jə, -(ˌ)jä\
: a fighter who is trained in the Japanese martial arts
plural ninja also ninjas
Full Definition of NINJA
: a person trained in ancient Japanese martial arts and employed especially for espionage and assassinations
See ninja defined for English-language learners
See ninja defined for kids
ADVERTISEMENT
Origin of NINJA
Japanese, from nin- persevere, conceal, move stealthily + -ja person
NINJAS Defined for Kids
ninja
noun nin·ja \ˈnin-jə\
plural ninja also nin·jas
Definition of NINJA for Kids
: a person trained in ancient Japanese martial arts who works as a spy and assassin especially in the past
Seen & Heard
What made you want to look up ninja? Please tell us where you read or heard it (including the quote, if possible).