She used this to mark a black line on the wall.

It is sometimes used to mark things that are wrong, important, or dangerous.

It can be used to mark a contradiction of what the other person has just said.

Very high levels may be used to mark graduate courses.

It is used to mark differences of time in working problems on the globe.

This statement is used to mark a particular table to be pinned.

The animation that used to mark his game has also returned.

It can be used to mark angles of 90 and 45 degrees.

In some towns the bells were also used to mark the time.

In typing programs, it is used to mark a return that one needs to type.