# Blu-ray

> English word · Noun · IPA [ˈbluːˌɹeɪ]

## Definitions
1. The Blu-ray Disc format.
2. A Blu-ray Disc.

## Etymology
From blue + ray, coming from the blue laser ray having a shorter wavelength and making a higher data density possible.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/blu-ray