Definitions

1. interjection

an expression of joy, excitement, or enthusiasm, often used to express approval or to urge someone on

“The crowd erupted in a loud ‘banzai’ as the team scored a goal.”

2. noun

a fierce, reckless, and impetuous charge, especially by Japanese soldiers during World War II

“The soldiers made a banzai charge against the enemy lines.”

3. verb

to charge recklessly and aggressively, often in a futile or suicidal manner

“The general ordered his troops to banzai the enemy positions.”

4. adverb

in a reckless or impetuous manner

“The soldiers banzai attacked the enemy fortifications.”