[sem-ee-sen-ten-ee-uh l, sem-ahy-]
- of or relating to a fiftieth anniversary.
- a fiftieth anniversary.
- the celebration of this anniversary.
Origin of semicentennial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (prenominal) of or relating to the 50th anniversary of some event
- occurring once every 50 years
- a 50th anniversary