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Definition of octagonal

octagonal

/ɒkˈtæɡ.ə.nəl/
oc · tag · o · nal
Adverb:octagonally
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octagonal Lexical Profile

octagonal Game Scores & Validity

• adjective

1

Having the shape of an octagon; characterized by eight straight sides and eight angles.

Example

"The historic baptistery features an octagonal floor plan topped by a high vaulted dome."

Synonyms
View all synonyms for octagonal

• Rhymes for octagonal

• Nearby Words

ocher
ochna
octagon
octagonal
octane
octave
octet

Word Origin & Etymology

Formed in the mid-17th century from the noun octagon plus the suffix -al, tracing back through Latin octagonos to Ancient Greek oktagonon, meaning 'eight-angled' (from okto 'eight' and gonia 'angle').

Cite this Entry

Wordmom. (2026). Definition of Octagonal. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/octagonal
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