noun ·Rare ·Advanced level

Definitions

Noun

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

Etymology

From ring + down.

Related phrases

black holegravitational wavetelephone operator

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.