semicentennial: Meaning and Definition of
sem•i•cen•ten•ni•al
Pronunciation: (sem"ē-sen-ten'ē-ul, sem"ī-), [key]
— adj.
- of or pertaining to a fiftieth anniversary.
—n.
- a fiftieth anniversary.
- the celebration of this anniversary.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.