These contracts let buyers lock in a price for basic materials.

VOA: special.2010.12.03

Investors flooded in to lock in high profits.

VOA: standard.2010.03.23

As we cross the river, he takes us through a lock he says has been closed since Hurricane Katrina in 2005.

VOA: standard.2010.05.09

Entire sections of Washington have been on virtual lock-down in advance of the summit.

VOA: standard.2010.04.11

The interrogators were told they could put them in painful standing positions, deprive them of solid food, keep them awake for extended periods of time, lock them in cold rooms, and submit them to the technique of simulated drowning known as waterboarding.

VOA: standard.2009.04.17

"So I did do something about it go home and lock myself in my garage, in my recording studio, and not going to come out until I sound so different that I make my mother happy and she knows me from anybody else.

VOA: standard.2009.08.14