# brainwave

> English word · Noun · frequency rank #66,521

## Definitions
1. Any of many rhythmic fluctuations of electric potential between parts of the brain, especially those seen on an electroencephalogram.
2. A sudden idea, understanding, or inspiration; a brainstorm.

## Etymology
From brain + wave.

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