pentagon

[ pen-tuh-gon, -guhn ]

/ ˈpɛn təˌgɒn, -gən /

SEE SYNONYMS FOR pentagon ON THESAURUS.COM

noun

a polygon having five angles and five sides.

the Pentagon,

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.

Origin of pentagon

1560–70; <Late Latin pentagōnum<Greek pentágōnon, noun use of neuter of pentágōnos five-angled. See penta-, -gon

OTHER WORDS FROM pentagon

pen·tag·o·nal

[pen-tag-uh-nl], /pɛnˈtæg ə nl/, adjectivepen·tag·o·nal·ly, adverbsub·pen·tag·o·nal, adjective

Words nearby pentagon

pentad, pentadactyl, pentadecagon, pentaerythritol, pentaerythritol tetranitrate, pentagon, pentagonal dodecahedron, Pentagonese, pentagonoid, Pentagon Papers, pentagram

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for pentagon

Pentagon leaders agree to a person that the U.S. war against ISIS is succeeding.
Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War|Nancy A. Youssef|January 7, 2015|DAILY BEAST
“I think it is important to say it is too soon to judge success or failure,” said Col. Steven Warren, a Pentagon spokesman.
Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War|Nancy A. Youssef|January 7, 2015|DAILY BEAST
Granted, James is in an office in the Pentagon, and not on the front lines.
Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War|Nancy A. Youssef|January 7, 2015|DAILY BEAST
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|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|DAILY BEAST
In rounders the bases are five in number and the field a pentagon in shape.
Base-Ball|John M. Ward
Its Roman name was Anderida, the walls enclosing an irregular oval, the castle within being a pentagon, with towers at the angles.
England, Picturesque and Descriptive|Joel Cook
Apparently he got his communication from the Pentagon about the time I got mine.
Sense from Thought Divide|Mark Irvin Clifton
Pentagon -um: a five-sided figure with five equal or unequal angles.
Explanation of Terms Used in Entomology|John. B. Smith
Can you fold a square piece of paper in such a way that with a single fold it forms a pentagon?
My Discovery of England|Stephen Leacock

British Dictionary definitions for pentagon (1 of 2)

pentagon

/ (ˈpɛntəˌɡɒn) /

noun

a polygon having five sides

Derived forms of pentagon

pentagonal (pɛnˈtæɡənəl), adjective

British Dictionary definitions for pentagon (2 of 2)

Pentagon

/ (ˈpɛntəˌɡɒn) /

noun

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

Cultural definitions for pentagon (1 of 2)

pentagon

A polygon having five sides.

notes for pentagon

The Pentagon is a huge five-sided building near Washington, D.C., that contains offices of the Department of Defense.

Cultural definitions for pentagon (2 of 2)

Pentagon

An immense five-sided building in Virginia, just outside Washington, D.C., that serves as headquarters for the Department of Defense.

notes for Pentagon

The term is often used to refer to the Department of Defense or the military: “The Pentagon agreed today to submit the modified weapons plan to the president.”

notes for Pentagon

The Pentagon was severely damaged by the September 11 attacks.

Scientific definitions for pentagon

pentagon

[ pĕn′tə-gŏn′ ]

A polygon having five sides.

Other words from pentagon

pentagonal adjective (pĕn-tăg′ə-nəl)

单词	pentagon
释义	pentagon [ pen-tuh-gon, -guhn ] / ˈpɛn təˌgɒn, -gən / SEE SYNONYMS FOR pentagon ON THESAURUS.COM noun a polygon having five angles and five sides. the Pentagon, 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. Origin of pentagon 1560–70; <Late Latin pentagōnum<Greek pentágōnon, noun use of neuter of pentágōnos five-angled. See penta-, -gon OTHER WORDS FROM pentagon pen·tag·o·nal [pen-tag-uh-nl], /pɛnˈtæg ə nl/, adjectivepen·tag·o·nal·ly, adverbsub·pen·tag·o·nal, adjective Words nearby pentagon pentad, pentadactyl, pentadecagon, pentaerythritol, pentaerythritol tetranitrate, pentagon, pentagonal dodecahedron, Pentagonese, pentagonoid, Pentagon Papers, pentagram Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for pentagon Pentagon leaders agree to a person that the U.S. war against ISIS is succeeding. Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War\|Nancy A. Youssef\|January 7, 2015\|DAILY BEAST “I think it is important to say it is too soon to judge success or failure,” said Col. Steven Warren, a Pentagon spokesman. Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War\|Nancy A. Youssef\|January 7, 2015\|DAILY BEAST Granted, James is in an office in the Pentagon, and not on the front lines. Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War\|Nancy A. Youssef\|January 7, 2015\|DAILY BEAST 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\|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\|DAILY BEAST In rounders the bases are five in number and the field a pentagon in shape. Base-Ball\|John M. Ward Its Roman name was Anderida, the walls enclosing an irregular oval, the castle within being a pentagon, with towers at the angles. England, Picturesque and Descriptive\|Joel Cook Apparently he got his communication from the Pentagon about the time I got mine. Sense from Thought Divide\|Mark Irvin Clifton Pentagon -um: a five-sided figure with five equal or unequal angles. Explanation of Terms Used in Entomology\|John. B. Smith Can you fold a square piece of paper in such a way that with a single fold it forms a pentagon? My Discovery of England\|Stephen Leacock British Dictionary definitions for pentagon (1 of 2) pentagon / (ˈpɛntəˌɡɒn) / noun a polygon having five sides Derived forms of pentagon pentagonal (pɛnˈtæɡənəl), adjective British Dictionary definitions for pentagon (2 of 2) Pentagon / (ˈpɛntəˌɡɒn) / noun 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 Words related to pentagon cinquefoil, pentangle, pentagram, quintuple, lustrum, cinque, quinquennium, pentacle, quintette, quintuplet, limerick, pentad, quincunx, quinquennial, quintuplicate Cultural definitions for pentagon (1 of 2) pentagon A polygon having five sides. notes for pentagon The Pentagon is a huge five-sided building near Washington, D.C., that contains offices of the Department of Defense. Cultural definitions for pentagon (2 of 2) Pentagon An immense five-sided building in Virginia, just outside Washington, D.C., that serves as headquarters for the Department of Defense. notes for Pentagon The term is often used to refer to the Department of Defense or the military: “The Pentagon agreed today to submit the modified weapons plan to the president.” notes for Pentagon The Pentagon was severely damaged by the September 11 attacks. 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. Scientific definitions for pentagon pentagon [ pĕn′tə-gŏn′ ] A polygon having five sides. Other words from pentagon pentagonal adjective (pĕn-tăg′ə-nəl) The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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pentagon

noun

Origin of pentagon

OTHER WORDS FROM pentagon

Words nearby pentagon

Example sentences from the Web for pentagon

British Dictionary definitions for pentagon (1 of 2)

noun

Derived forms of pentagon

British Dictionary definitions for pentagon (2 of 2)

noun

Words related to pentagon

Cultural definitions for pentagon (1 of 2)

notes for pentagon

Cultural definitions for pentagon (2 of 2)

notes for Pentagon

notes for Pentagon

Scientific definitions for pentagon

Other words from pentagon