haltrule
nounUK /ˈhɔːltruːl/
US /ˈhɔːltruːl/
A haltrule is a special rule that tells everyone to stop and wait.
The teacher made a haltrule so the children would stop running in the hall.
OTHER MEANINGS
2. A rule that ends a game or activity for a short time.
The referee used the haltrule to pause the match during the storm.
3. A signal or command that makes a machine stop working.
Pressing the red button triggers the haltrule on the conveyor belt.
4. A law that stops a process from going forward.
The new haltrule stopped the building work until the papers were checked.