Pentagon

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Pentagon \Pen"ta*gon\, n. [Gr. penta`gwnon; penta- (see
     {Penta-}) + gwni`a angle: cf. L. pentagonium, F. pentagone.]
     (Geom.)
     A plane figure having five angles, and, consequently, five
     sides; any figure having five angles.
     [1913 Webster]


  
     {Regular pentagon}, a pentagon in which the angles are all
        equal, and the sides all equal.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  Pentagon
       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

From U.S. Gazetteer (1990) [gazetteer]:

  Pentagon, DC
    Zip code(s): 20301