|Origin:||railler 'to make fun of', from Late Latin ragere 'to make the sound of a horse'|
to enclose or separate an area with rails [↪ cordon off]
rail something off/in
The police railed off the area where the accident happened.
2 [intransitive and transitive] formal
to complain angrily about something, especially something that you think is very unfair
Consumers rail against the way companies fix prices.