# Kira

/ˈkɪɹɑ/ (US) · CEFR C2 · Noun

Source: https://englishreference.com/word/kira
Updated: 2026-08-15

## Definition

a person who kills criminals or people they think are bad, usually because they believe they are doing something good for the world. This word comes from a famous Japanese story and is often used online.

For teachers: a vigilante who targets and executes individuals perceived as immoral or criminal. Derived from the Japanese pronunciation of 'killer', it is primarily used in the context of pop culture or internet discourse regarding self-appointed justice.

## Examples

- The mysterious killer was nicknamed Kira by the public.
- Online debates often focus on whether Kira is a hero or a common murderer.
- The narrative explores the psychological descent of a student who adopts the persona of Kira, believing that his supernatural ability to eliminate criminals will create a utopia.

## Usage notes

- Often used as a proper noun or a title in fan communities; derived from the Japanese loanword 'kira' (killer).

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.