Meanings
nounsemicentenarian (plural semicentenarians)
plural semicentenarians
- Synonym of fiftysomething: A person celebrating a semicentenary; a person between 50 and 59 years old.
Synonyms: fiftysomething
Synonyms & antonyms
nounSynonym of fiftysomething: A person celebrating a semicentenary; a person between 50 and 59 years old.
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Also see
Origin
From semicentenary (“50 year, 50th anniversary”) + -ian (“person”), equivalent to semi- (“half”) + centenarian (“100-year-old”), q.v.
Full word history & related roots →Cite this entry
APA
semicentenarian. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/semicentenarian
MLA
“semicentenarian.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/semicentenarian. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “semicentenarian,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/semicentenarian.
Source: semicentenarian on Wiktionary, CC BY-SA 4.0.