octagonnoun [ C ]
uk/ˈɒk.tə.ɡən/us/ˈɑːk.tə.ɡɑːn/a flat shape with eight sides
Thesaurus: synonyms and related words
Geometrical shapes
- -cornered
- -dimensional
- arch
- asymmetric
- circular
- cuboid
- cylinder
- cylindrical
- dome
- hexagon
- incongruent
- isometric
- lozenge
- ovoid
- parallelogram
- polygon
- quadrilateral
- rhombus
- spherical
- triangle
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octagonal
adjective uk/ɒkˈtæɡ.ən.əl/us/ɑːk-/
an octagonal (= with eight sides) tower