The English Wiktionary has a dictionary definition (meanings of a word) for: regatta
A regatta is a term used to describe either a boat race, or series of boat races.
Although the term typically describes racing events of unpowered watercraft, some powerboat race series are also called regattas. Most commonly, a regatta is either a series of rowing, sailing or yacht racing.
Although regattas are typically amateur competitions, they are usually very highly organized, formally structured events, with complex rules precisely describing the schedule and procedures of the event.
Henley Royal Regatta, held every year on the river Thames is the most prestigious British event
The Boat Race is a rowing race between the Oxford University Boat Club and the Cambridge University Boat Club. It is rowed annually each Spring on the Thames in London.
Mallory Cup, United States high school sailing national championships.
The National School Sailing Assosiation Regatta, UK. Annual Sailing reggatta held in various sailing clubs and competed in by many secondary school students.