noun
octagon
OK-tuhgn
noun
1
A shape with eight straight sides and eight angles.
"The gazebo was built as a perfect octagon."
"Stop signs are one of the most recognizable octagons in everyday life."
2
The eight-sided fenced arena used for mixed martial arts fights.
"The fighters touched gloves before stepping into the Octagon."
How to Use Octagon
Learner’s notesIn plain EnglishAn eight-sided shape, or (capitalized) the eight-sided cage used in MMA.
Common pairings
a regular octagon
step into the Octagon
an octagon-shaped table
Word Forms
octagons plural
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Etymology
From Greek okto- ("eight") plus -gonon ("angled"), the same building blocks found in "pentagon" and "hexagon".