1. The tough outer covering of the woody stems and roots of trees, shrubs, and other woody plants. It includes all tissues outside the vascular cambium.
2. A specific kind of bark used for a special purpose, as in tanning or medicine.

1. To remove bark from (a tree or log).
2. To rub off the skin of; abrade: barked my shin on the car door.
3. To tan or dye (leather or fabric) by steeping in an infusion of bark.
4. To treat (a patient) using a medicinal bark infusion.

[Middle English, from Old Norse börkr.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.