Noun. Kpop boy group that debuted on October 10th, 2016 (10/10) and is produced by entertainment company Cube. Consists of ten members: Jinho, Hui, Hongseok, E.Dawn, Shinwon, Yeo One, Yan An, Yuto, Kino, and Wooseok.

The group debuted with the song Gorilla and is currently very active in both Korea and Japan. They also had a variety show called Pentagon Maker to showcase their skills before debut. Their fandom name is called "Universe."
Universe: Wow, I love Pentagon so much! They have so much fan service!
International Universe: Wow, I can't wait until Pentagon comes to my country for a concert and then leave the very next day!
by kinotherapy December 12, 2017
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The pentagonal building serving as the headquarters of the US Department of Defense, near Washington, DC. The Pentagon's unique shape makes it a highly efficient office building. Although the Pentagon has 3,705,793 square feet (1,129,526 meters) of office space, it is possible to reach most points in the building within 10 minutes, a remarkable architectural achievement. In a building which coordinates the armed forces of the United States along with organizations responsible for intelligence and security, workers often need to be able to access each other quickly.
The idea of the Pentagon was conceived in 1941, when Brigadier General Brehon Sommervell was trying to solve the problem of limited space for the Department of Defense, a serious issue in the Second World War. It was agreed that a new building was needed, and a groundbreaking ceremony took place on 11 September, 1941. It took just two years to complete the building on former marshlands along the outskirts of Washington, and the Pentagon was quickly filled with communications equipment and staff to coordinate the Department of Defense.
by Dancing with Fire September 6, 2012
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1. Where Bush's monkeys sit and try to pronounce the names of the countrys they are bombing

2. A five sided shape with five corners

3. What wannabe Satanists draw on their walls, genitals and on the ground in white chalk
1. There's a mass without roofs. Let's bomb 'em!

2. This shape has five sides. Lets go for a walk and discuss the matter further

3. Nah, only joking. I'm not another member of the greedy society. Brothers
by The G November 21, 2003
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The Pentagon is the headquarters of the United States Department of Defense, located in Arlington County, Virginia, across the Potomac River from Washington, D.C. As a symbol of the U.S. military, The Pentagon is often used metonymically to refer to the U.S. Department of Defense
by Game mode 0 November 29, 2016
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The most down ass drinking group in the world. Members include The Dr., Your Royal Nastiness, Brando, Sleezy Lee, and 40 Hands. They have set out incredible records with beerpong and "stats."
"Ah shit the Pentagon's here? Hide the beer and the girls!"
by 40 Hands August 28, 2006
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a 9 (previously 10) member kpop group. they debuted on October 10, 2016 and consist of jinho, hui, hongseok, shinwon, yeo one, yanan, yuto, kino, and wooseok. they only produce bops, please stan them
kpop fan 1 : omg have y’all heard pentagons new song humph!?
kpop fan 2 : no, I only listen to shine. :(
kpop fan 3 : I’m a universe too! humph is so good! the other songs on the album are amazing too! i love fantasystic
by mimijoji October 8, 2019
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1. The new airport which opened on 9/11
2. Shape with 5 sides
1. Flight 911 to the airport, we will be shortly landing.
by N. Gin September 12, 2010
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