pylon
US /ˈpaɪ.lɑːn/
UK /ˈpaɪ.lɑːn/

1.
a tall metal structure used for carrying electricity cables high above the ground
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High-voltage power lines are suspended from massive pylons.
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The storm caused several pylons to collapse, leading to widespread power outages.
2.
a cone-shaped marker used on roads or sports fields to guide traffic or mark boundaries
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The driving instructor set up a course with several orange pylons.
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The athletes had to weave through a series of pylons during the agility drill.
3.
a monumental gateway of an ancient Egyptian temple, consisting of two tapering towers, each surmounted by a cornice and joined by a less elevated section enclosing the entrance
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The grand temple was entered through an imposing pylon.
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Ancient Egyptian temples often featured massive pylons at their entrances.