haltline
nounUK /ˈhɔːltlaɪn/
US /ˈhɔːltlaɪn/
A haltline is a line you must stop at before going any further.
The bus stopped right at the haltline painted on the road.
OTHER MEANINGS
2. A line on a railway track where trains must stop.
The train waited at the haltline until the signal turned green.
3. A boundary in a game that players cannot cross.
If you step over the haltline, you have to go back to the start.
4. A marked line on a factory floor where workers pause before entering.
Everyone must stand behind the haltline before the machines start.