- A framed section of a window or door that is usually filled with a sheet of glass or other transparent material. (noun)
- The transparent material used to fill such a section. (noun)
- A panel, as of a door or wall. (noun)
- One of the flat surfaces or facets of an object, such as a bolt, having many sides. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.