disreefing

Verb

disreef (third-person singular simple present disreefs, present participle disreefing, simple past and past participle disreefed)

1. (space flight) To allow (a reefed parachute) to fully open.
   • Once the SRBs decelerate following initial main-parachute deployment, the parachutes disreef in stages to gradually slow the boosters to a safe splashdown speed.
2. To let out (a reefed sail) to increase the area it exposes to the wind.