reaction force
noun
1A force equal and opposite to a force giving rise to it; compare sense 2b.
2 Military a military unit kept in a state of readiness for rapid deployment to counter hostile activity.
Origin
1920s; earliest use found in The New York Times.
- run out on
- run-out table
- run over
- run-producer
- run proof
- run rate
- run resist
- run resistant
- runrig
- run rings round
- run riot
- run-round
- runshie
- run someone in
- run someone out
- run someone out of town
- run someone ragged
- run someone/thing close
- run someone/thing down
- run someone/thing over
- run someone/thing through
- run someone/thing to earth (or ground)
- run someone/thing to ground
- run something by (or past)
- run something down (or run down)