WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a heat-insulating building material consisting of cork granules that are made into sheets by compressing and baking
Word Usage
"The corkboard is great (you can even replace the cork with your own background image) and it also has an outliner mode (which I haven't explored yet) and lets you import web pages and multimedia files into your 'Research' binder."