Semicentennial Definition

sĕmē-sĕn-tĕnē-əl, sĕmī-
adjective
Marking the 50th anniversary of an event.
American Heritage
Of or ending a period of 50 years.
Webster's New World
Synonyms:
  • semicentenary
noun
A 50th anniversary or its commemoration.
Webster's New World
Synonyms:
  • semicentenary

Other Word Forms of Semicentennial

Noun

Singular:
semicentennial
Plural:
semicentennials

Origin of Semicentennial

  • semi- (“half") +"Ž centennial (“of 100 years")

    From Wiktionary

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semicentennial