In some cases, such as a university campus, the bicycles are only designated for use within certain boundaries.

These markets are all restricted to be under control of certain boundaries in that company or country.

At the same time, however, the strikes seemed to take place within certain boundaries that prevented serious violence or disastrous consequences to society.

"One wants to, but the other has certain boundaries they can't cross."

"Along with that is a breaking down of certain boundaries."

We all know that there are certain boundaries, a code of honor, if you can say that.

It is of decisive importance to our group that certain ethical boundaries are drawn in this directive.

It is not uncommon for people in an exclusive dating relationship to give up certain boundaries.

That of the second, though it may rise greatly, has, however, a certain boundary beyond which it cannot well pass for any considerable time together.

Neither sleeping nor waking may overstep a certain boundary in their effect.