Definition of retro-firing in US English:

retro-firing

noun

Astronautics
  • The action or process of firing the retro-rockets of a spacecraft; an instance of this.

Origin

1950s; earliest use found in Missiles & Rockets. From retro- + firing.

Pronunciation

retro-firing

/ˈrɛtrəʊfʌɪərɪŋ/