We stood together, in this case at least, on the same side of that grim and arbitrary line.

Divide an island, and separate parliaments spring up on each side of an arbitrary line.

But where do we draw that arbitrary line on this stuff?

It was as if he were daring her to cross some arbitrary line.

An arbitrary line was drawn between the two positions.

Navigation in a tactical situation like that is difficult enough without having to worry about stepping over an arbitrary line twelve miles from the beach.

"Public policy tends to follow arbitrary lines, but the economy does not."

For instance, lying on the cell floor, I established an arbitrary and imaginary line along the wall some three feet above the floor.

You don't decide need based on an arbitrary line.

Thus, officially arbitrary lines which produced segregated districts could not be challenged.