Meanings
adjectivetwenty-oneth (not comparable)
- nonstandardnot comparabletwenty-first
nountwenty-oneth (plural twenty-oneths)
plural twenty-oneths
- nonstandardA fractional part of twenty-one, a twenty-first
average ministerial age of pastors 22 years and nineteen twenty-oneths; average pastoral age, 13 years and ten twenty-oneths
1844, “VI. New London Association.”, in Minutes of the General Association of Connecticut, at their Meeting in New London: June, 1844., page Appendix, p. 32Synonyms: twenty-first
Synonyms & antonyms
nounA fractional part of twenty-one, a twenty-first
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Also see
Origin
From twenty-one + -th (ordinal suffix).
Full word history & related roots →Cite this entry
APA
twenty-oneth. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/twenty-oneth
MLA
“twenty-oneth.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/twenty-oneth. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “twenty-oneth,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/twenty-oneth.
Source: twenty-oneth on Wiktionary, CC BY-SA 4.0.