Adverb
Once in two years.
Source: Webster's dictionarythis festival takes places biennially Source: Internet
Following Final Fantasy XIV, Square Enix stated that it intended to release Final Fantasy games either annually or biennially. Source: Internet
The races themselves have been moved from the waters of Florida to the United States Naval Surface Warfare Center's Carderock Division David Taylor Model Basin in Bethesda, Maryland, and are held biennially. Source: Internet
The Farnborough Airshow is a popular international event, held biennially. Source: Internet
It is awarded biennially by the Bibliotheca Hertziana – Max Planck Institute of Art History in Rome. Source: Internet
It is one of the earliest literary awards in Baden-Württemberg and is awarded biennially to German-language writers whose work coincide with Schubart's "liberal and enlightened reasoning". Source: Internet