Definition of sesquicentenary in English:



  • The one-hundred-and-fiftieth anniversary of a significant event.

    ‘the year in which both celebrate their sesquicentenaries’
    • ‘The sesquicentenary of the Eureka Stockade in Ballarat, Victoria, is due to be commemorated on December 3.’
    • ‘A note from the Department of Posts says that the Cartes Maxim series is also in celebration of the sesquicentenary of India Post.’
    • ‘That is the challenge confronting this Parliament as it embarks upon its second sesquicentenary.’


  • Relating to a sesquicentenary.

    ‘part of the Society's sesquicentenary celebrations’
    • ‘Shirley Fitzgerald's Sydney 1842-1992 and shorter books on Chippendale, Surry Hills, Millers Point, and Pyrmont were a major part of Sydney City Council's sesquicentenary celebrations.’