Even after the troops have been sent, Congress can help define their mission.

The students defined their mission in 15 words or less.

Has anyone stopped to define the world's mission in the Balkans?

Today the foundation defines its mission as providing access to the "economic, ethical and legal principles of a free society."

And even after that, the center continued to define its mission even as the design was taking shape.

The 75-year-old organization defines its primary mission as using English to foster communication and understanding among the people of the world.

"The Kennedy school defines its mission as training public leaders," he said.

Welfare programs used to define their mission as "income maintenance."

"We're trying to define our mission in contemporary society," he said.

"I believe you have just defined your mission, Lieutenant."