pentagon

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noun pen·ta·gon \ˈpen-tə-ˌgän\

Definition of pentagon

  1. :  a polygon of five angles and five sides

Examples of pentagon in a sentence

  1. The general attended a meeting at the Pentagon.

  2. There was disagreement between the President and the Pentagon over the new military budget.

Origin and Etymology of pentagon

Greek pentagōnon, from neuter of pentagōnos pentagonal, from penta- + gōnia angle — more at -gon


First Known Use: 1570


Pentagon

noun pen·ta·gon

Definition of Pentagon

  1. :  the U.S. military leadership

Origin and Etymology of pentagon

the Pentagon building, headquarters of the Department of Defense


First Known Use: 1945



PENTAGON Defined for English Language Learners

pentagon

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noun pen·ta·gon \ˈpen-tə-ˌgän\

Definition of pentagon for English Language Learners

  • mathematics : a flat shape that has five sides and five corners

  • the Pentagon : the building in Washington, D.C., that is the headquarters of the U.S. Department of Defense

  • : the leaders of the U.S. military


PENTAGON Defined for Kids

pentagon

play
noun pen·ta·gon \ˈpen-tə-ˌgän\

Definition of pentagon for Students

  1. :  a flat geometric figure having five angles and five sides



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