Pronunciation: (dē'pun), [key]
v.t., v.i.
1. to make or become deep or deeper: Larger ships will be able to navigate the river after the main channel is deepened. The shadows deepened toward late afternoon.
2. decrease in atmospheric pressure: a deepening cyclone.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

deep-dyeddeep-etch plate
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