Definitions

1. noun

A type of rocket motor that uses solid fuel, which is typically a combination of ammonium perchlorate and a binding polymer, to produce thrust.

“The spacecraft relied on a retrofire system to slow down its descent into the planet’s atmosphere.”

2. verb

To redirect or turn back, especially in a situation where a course of action is being reversed or undone.

“The manager had to retrofire the entire project due to unforeseen delays and budget constraints.”