So you're not just a closed box of educationists.

Even a nearly odourless material such as wood may build up a strong smell if kept in a closed box for months.

What if the lights go off and you can hear the other person breathing within the closed box of complete darkness?

"The old days of being a closed black box where you're off in private doing your work - that just isn't fast enough," she said.

At least help me keep the closed boxes shut up tight forever!

He held the closed box tightly against his chest.

A cigarette leaped out of a closed box and into place between her lips.

They say, "A consumer electronics device is a closed box.

It was a closed box, with no door to the street.

Those vehicles have similar bodies to pickups but are finished on the back with a closed box rather than an open bed.