thirty.
The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30.
Meaning & usage
The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30.
Where this word comes from
From Middle English thirty, metathetic alternant of thritty, from Old English þrītiġ, þrittiġ (“thirty”), from Proto-Germanic *þrīz tigiwiz (“thirty”, literally “three tens”), equivalent to three + -ty. Cognate with Scots therty, tretty (“thirty”), West Frisian tritich (“thirty”), Dutch dertig (“thirty”), German dreißig (“thirty”).
A rack of thirty beers.
A commercial lasting 30 seconds.
Where this word comes from
From Middle English thirty, metathetic alternant of thritty, from Old English þrītiġ, þrittiġ (“thirty”), from Proto-Germanic *þrīz tigiwiz (“thirty”, literally “three tens”), equivalent to three + -ty. Cognate with Scots therty, tretty (“thirty”), West Frisian tritich (“thirty”), Dutch dertig (“thirty”), German dreißig (“thirty”).
Try it on your idea.
thirty has 6 characters. Say it out loud, try it alongside a description of your project, and see whether its meaning fits what you want to create.
These are naming prompts. Meanings and pronunciation can vary; existing brand and domain uses have not been checked.
Explore the name generatorA word with a source.
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.