also off-limits
1.
If a place is off limits to someone, they are not allowed to go there.
Downing Street has been off limits to the general public since 1982...
Certain areas have been declared off limits to servicemen.
ADJ : usu v-link ADJ , oft ADJ to n
2.
If you say that an activity or a substance is off limits for someone, you mean that they are not allowed to do it or have it.
Fraternizing with the customers is off-limits...
ADJ : v-link ADJ , oft ADJ for n