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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 pen·ta·gon /ˈpɛntəˌgɑn/

From: Webster's Revised Unabridged Dictionary (1913)

 Pen·ta·gon n.  Geom. A plane figure having five angles, and, consequently, five sides; any figure having five angles.
 Regular pentagon, a pentagon in which the angles are all equal, and the sides all equal.

From: WordNet (r) 2.0

      n 1: a government building with five sides that serves as the
           headquarters of the United States Department of Defense
      2: the United States military establishment
      3: a five-sided polygon