octagon
nounUK /ˈɒk.tə.ɡən/
US /ˈɑːk.tə.ɡɑːn/
An octagon is a flat shape with eight straight sides.
The stop sign at the corner is shaped like an octagon.
OTHER MEANINGS
2. A building or room that has eight sides.
The old tower was built as an octagon with windows on every side.
3. In mixed martial arts, the eight-sided fighting cage used for bouts.
The fighters stepped into the octagon for the main event.
4. A figure or design arranged in eight parts, such as an eight-pointed star.
The mosaic floor featured a colorful octagon at its center.