ˌoff ˈlimits adjective
be off limits
a) if a place is off limits, you are not allowed to go there Synonym : out of bounds
be off limits to/for
Footpaths are, of course, off limits to bikers.
b) if a subject is off limits, you are not allowed to talk about it:
Unlike most group discussions, nothing was off limits.

[TahlilGaran] Dictionary of Contemporary English ▲

off limits
1.
if an area is off limits, you are not allowed to enter it.
When we were kids, our parents' bedroom was definitely off limits.

2.
not allowed.
Today's magazines tackle the sort of subjects that would once have been considered off limits.

What he does make very clear is that questions about his private life are off limits.

[TahlilGaran] English Idioms Dictionary ▲

off limits
to be forbidden
The factory was off limits to everybody except the workers who worked there.

[TahlilGaran] English Idioms Dictionary ▲

off limits
See: OUT OF BOUNDS.

[TahlilGaran] English Idioms Dictionary ▲