a polygon having five angles and five sides.
a building in Arlington, Virginia, having a plan in the form of a regular pentagon, containing most U.S. Defense Department offices.
the U.S. Department of Defense; the U.S. military establishment.
- pen·tag·o·nal [pen-tag-uh-nl], /pɛnˈtæg ə nl/, adjective
- pen·tag·o·nal·ly, adverb
- sub·pen·tag·o·nal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use pentagon in a sentence
pentagon leaders agree to a person that the U.S. war against ISIS is succeeding.
“I think it is important to say it is too soon to judge success or failure,” said Col. Steven Warren, a pentagon spokesman.
Granted, James is in an office in the pentagon, and not on the front lines.
The pentagon said Faal served in the Air Force for seven years, during which time he became a U.S. citizen.The Shadowy U.S. Veteran Who Tried to Overthrow a Country | Jacob Siegel | January 6, 2015 | THE DAILY BEAST
But the program is just six weeks long, the pentagon admitted Monday.Pentagon Insider on New Plan to Fight ISIS: ‘Of Course It’s Not Enough’ | Nancy A. Youssef | January 6, 2015 | THE DAILY BEAST
Apparently he got his communication from the pentagon about the time I got mine.Sense from Thought Divide | Mark Irvin Clifton
They circled the pentagon with hundreds of protestors and said a magic spell that was supposed to levitate it.Little Brother | Cory Doctorow
The trick was to come up with something with the media friendliness of the levitation of the pentagon.Little Brother | Cory Doctorow
Miles went on to say that he had just been conferring with Ahlgren at the pentagon.Tom Swift and The Visitor from Planet X | Victor Appleton
Monroe is a five-bastioned fort of masonry work, and accordingly might be roughly described as a huge pentagon.The Old First Massachusetts Coast Artillery in War and Peace | Frederick Morse Cutler
British Dictionary definitions for pentagon (1 of 2)
a polygon having five sides
- pentagonal (pɛnˈtæɡənəl), adjective
British Dictionary definitions for Pentagon (2 of 2)
the five-sided building in Arlington, Virginia, that houses the headquarters of the US Department of Defense
the military leadership of the US
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for pentagon
A polygon having five sides.
- pentagonal adjective (pĕn-tăg′ə-nəl)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for pentagon (1 of 2)
A polygon having five sides.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.