# ringdown

> English word · Noun

## Definitions
1. The stage in a black hole merging event where the gravitational wave amplitude reaches its peak.
2. A signal to a telephone operator that both rings a bell and allows a relay to drop.

## Etymology
From ring + down.

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