obelisk

US /ˈɑː.bəl.ɪsk/
UK /ˈɑː.bəl.ɪsk/
"obelisk" picture
1.

a tapering, four-sided stone pillar, typically having a pyramidal top, set up as a monument or landmark.

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The ancient Egyptians erected many grand obelisks.
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The Washington Monument is a famous obelisk.
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monumentpillarcolumnstele