Noun: semicentenary ,se-mee,sen'te-nu-ree [N. Amer], ,se-mee,sen'tee-nu-ree [Brit]
- The 50th anniversary (or the celebration of it)
"The university held a grand semicentenary celebration";
- semicentennial
- Of or relating to or marking the 50th anniversary
"The university held a semicentenary celebration to commemorate its founding";
- semicentennial
Derived forms: semicentenaries
Type of: anniversary, day of remembrance