Definitions

1. noun

A member of a secret society of highly trained Japanese assassins; a stealthy fighter, especially one skilled in martial arts.

“The ninja slipped quietly through the shadows, avoiding detection by the enemy guards.”

2. verb

To move or act with great stealth and speed, especially in a way that is difficult to detect.

“The thief ninja-ed out of the store without anyone noticing.”

3. adjective

Describing something as swift and agile, especially in a way that is difficult to detect.

“The ninja-like reflexes of the athlete allowed her to dodge the opponent’s attack.”