eighth.
The ordinal form of the number eight.
Meaning & usage
The ordinal form of the number eight.
Where this word comes from
Etymology tree Proto-Indo-European *oḱtṓw Proto-Indo-European *oḱtowós Proto-Germanic *ahtudô Proto-West Germanic *ahtudō Old English eahtoþa Middle English eightethe English eighth Inherited from Middle English eightethe, from Old English eahtoþa, from Proto-Germanic *ahtudô; equivalent to eight + -th (ordinal suffix).
The person or thing in the eighth position.
One of eight equal parts of a whole.
Two bits equals two eighths of a dollar.
An eighth of an ounce, or approximately 3.5 grams, of marijuana or other drugs.
An interval by doubling in pitch frequency.
Where this word comes from
Etymology tree Proto-Indo-European *oḱtṓw Proto-Indo-European *oḱtowós Proto-Germanic *ahtudô Proto-West Germanic *ahtudō Old English eahtoþa Middle English eightethe English eighth Inherited from Middle English eightethe, from Old English eahtoþa, from Proto-Germanic *ahtudô; equivalent to eight + -th (ordinal suffix).
To divide by eight.
Where this word comes from
Etymology tree Proto-Indo-European *oḱtṓw Proto-Indo-European *oḱtowós Proto-Germanic *ahtudô Proto-West Germanic *ahtudō Old English eahtoþa Middle English eightethe English eighth Inherited from Middle English eightethe, from Old English eahtoþa, from Proto-Germanic *ahtudô; equivalent to eight + -th (ordinal suffix).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.