We have to draw a line somewhere.

I'm sorry, I have another call on the other line. Can I call you back later?

I merged onto the highway using the acceleration line.

Our troops managed to infiltrate the enemy line.

The assembly line is an efficient method of production.

The bottom line of the income statement shows the company's net profit.

The bottom-line of the financial statement shows the final profit or loss.

The fall line is the point where multiple rivers become waterfalls.

The old-line company continues to follow tradition.

The Plimsoll line is a marking on a ship's hull that indicates the maximum safe loading level.