Definition of sesquicentenary in English:

sesquicentenary

noun

British
  • A sesquicentennial.

    • ‘Eric Richards edited a volume of social history for the South Australian sesquicentenary in 1986.’
    • ‘Victoria's sesquicentenary in 1984-85 prompted the controversial memorialisation of conflict between Aborigines and settlers, even on official plaques.’

adjective

  • Relating to a sesquicentennial.

    • ‘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.’

Pronunciation:

sesquicentenary

/ˌseskwəsenˈtenərē/