# third cosmic velocity

> English word · Proper noun

## Definitions
1. The escape velocity of the Solar System (interstellar speed).

## Etymology
From third + cosmic + velocity, from being the next threshold velocity greater than the second cosmic velocity.

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