reversers

/rɪˈvɜrsərz/
noun
  1. Devices or mechanisms that reverse the direction of something, especially the thrust of an aircraft engine to slow it down after landing.
    • The mechanic checked the reversers before the flight to ensure they worked properly.
    • Modern jet engines have reversers that help reduce braking distance.
    • The pilot engaged the thrust reversers to slow the plane on the runway.
  2. People or things that reverse a decision, action, or process.
    • The software includes reversers that undo recent changes automatically.
    • In the debate, the reversers argued against the original proposal.
    • The committee acted as reversers of the earlier policy, canceling the new rules.