Meaning of semicentennial

sem•i•cen•ten•ni•al

Pronunciation: (sem"ē-sen-ten'ē-ul, sem"ī-), [key]
— adj.
  1. of or pertaining to a fiftieth anniversary.
—n.
  1. a fiftieth anniversary.
  2. the celebration of this anniversary.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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