from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A closed plane figure bounded by three or more line segments.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A plane figure bounded by straight edges.
- n. The boundary of such a figure.
- n. A figure comprising vertices and (not necessarily straight) edges, alternatingly.
- n. Such a figure and its interior, taken as a whole.
from the GNU version of the Collaborative International Dictionary of English
- n. A plane figure having many angles, and consequently many sides; esp., one whose perimeter consists of more than four sides; any figure having many angles.
from The Century Dictionary and Cyclopedia
- n. In geometry, a closed figure formed by the intersections of a number of straight lines, each with two others; especially, a plane figure of this sort; a figure with numerous angles
- n. two sets of n lines, each cutting all the lines of the other set upon one curve of the nth order.
- n. A train of sects whose last point is identical with the first.
- n. In ordnance, a place especially arranged for making ballistic tests of guns, projectiles, armor, and powder. Same as proving-ground.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a closed plane figure bounded by straight sides
Ancient Greek πολύγωνον (polygōnon), from πολύς (polus, "many") and γωνία (gōnia, "angle"). (Wiktionary)