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ground plane[′grau̇nd ‚plān]
A grounding plate, aboveground counterpoise, or arrangement of buried radial wires required with a ground-mounted antenna that depends on the earth as the return path for radiated radio-frequency energy.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A horizontal plane of reference in linear perspective from which vertical measurements can be taken; usually it is the plane supporting the object depicted or the one on which the viewer stands. See also: Perspective projection
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The horizontal plane of projection in a perspective drawing; the horizontal plane upon which the object in the drawing rests.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.