Definify.com

Webster 1913 Edition

Semicentennial

Semˊi-cen-ten′ni-al

,

Adj.

Of or pertaining to half of a century, or a period of fifty years;

as, a

semicentennial

commemoration

.

Semˊi-cen-ten′ni-al

,

Noun.

A fiftieth anniversary.

Definition 2025

semicentennial

semicentennial

English

Adjective

semi centennial ‎(not comparable)

Occurring every 50 years

Noun

semicentennial ‎(plural semicentennials)

A 50th anniversary.
The city celebrated its semicentennial last year.