Definition of “pentagon” - English Dictionary

“pentagon” in British English

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pentagonnoun [ C ]

uk /ˈpen.tə.ɡən/ us /-t̬ə.ɡɑːn/

the Pentagonnoun

uk /ˈpen.tə.ɡən/ us /ˈpen.t̬ə.ɡɑːn/

the building in Washington where the US Defense Department is based, or the US Defense Department itself:

The Pentagon is aiming to cut US forces by over 25 percent in the next five years.

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(Definition of “pentagon” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“pentagon” in American English

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pentagonnoun [ C ]

us /ˈpent·əˌɡɑn/

geometry a flat, five-sided shape with five angles

Pentagonnoun [ U ]

us /ˈpent·əˌɡɑn/

the building where the US Defense Department is based, or the US Defense Department itself

(Definition of “pentagon” from the Cambridge Academic Content Dictionary © Cambridge University Press)