Oxford Advanced American Dictionary

Search results

octagon noun

Oxford Advanced Learner’s Dictionary App

Ask Text Checker

Improve your writing skills with the Oxford iWriter

1 million copies sold

Get an Oxford Advanced Learners Dictionary search box for your web site

Definition of octagon noun from the Oxford Advanced Learner's Dictionary

picture of an octagon

octagon

noun

octagon pronunciation English

ˈɒktəɡən

octagon pronunciation American

ˈɑːktəɡɑːn

(geometry)

a flat shape with eight straight sides and eight angles

octagonal

octagonal pronunciation English

ɒkˈtæɡənl

octagonal pronunciation American

ɑːkˈtæɡənl

adjectivean octagonal coin