English Dictionary

octagon

/ˈɒktəɡ(ə)n/

noun

(geometry, also attributively) A polygon with eight sides and eight angles. / (martial arts) Often in the form Octagon: the arena for mixed martial arts.

The stop sign has an octagon shape.

意味（1）

(geometry, also attributively) A polygon with eight sides and eight angles.

From the Circle deſcribe the Octagon, by taking half the Quadrant of the former for each Side of the latter. … [B]y conjoining theſe Points with ſtrait Lines agreeable to the Shape of the Octagon, the whole Work is completed.

意味（2）

(martial arts) Often in the form Octagon: the arena for mixed martial arts.