1) Figure with seven sides 2) Geometrical figure 3) Polygon 4) Polygon with seven sides 5) Polygonal shape 6) Seven-sided figure 
=={anchor|Star Heptagons} Star heptagons== Two kinds of star heptagons can be constructed from regular heptagons, labeled by Schläfli symbols {7/2}, and {7/3}, with the divisor being the interval of connection. Blue, {7/2} and green {7/3} star heptagons inside a red heptagon. ==Uses== The United Kingdom currently (2011) has two heptagonal coins, ...
• (n.) A plane figure consisting of seven sides and having seven angles.
Hep'ta·gon noun [ Greek ... sevencornered; 
A heptagon is a seven-sided polygon.
[n] - a seven-sided polygon
A seven sided polygon.
A polygon with 7 sides. Each internal angle is 128.6° and the sum of the internal angles is 900°. See also: Hexagon, Octagon, Polygon.