noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A small rocket engine on a larger rocket or spacecraft, designed to slow or reverse its motion.
2. 2
   a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course wordnet

Synonyms

All synonyms

retroretro

Etymology

From retro- + rocket.

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