He said that scientists had considered the possibility of using light as a device for reading and writing information from the small molecules.

Slow motion is often used here as a dramatic device.

It's bad enough that the terrorists are using fear as a device.

Language can be used as a rhetorical device to make a valid point.

The question is used as a rhetorical device or tool.

"That could be used as a sensing device," he said.

Do you think I use him as a handy device to help me have a child?

At times, notes have been used for their comical effect, or as a literary device.

Black Company discovers he can be used as a device to travel to distant places and times.