A sports dynasty is a team or individual that dominates their sport or league for an extended length of time. The definition of dynasty by some academics implies a single leader over the bulk of that period. The designation should not automatically be used for a string of several dominant years in a row, unless the number of years that the league has existed is few, making several years of dominance a large percentage. It implies an extended length of time. Sometimes such dominance is often only realized in retrospect.
The most widely accepted sports dynasties are those with the majority of championships over a very long period of time, either consecutively and / or with interruptions, e.g. the UCLA Bruins men's basketball team's seven straight national championships from 1964 to 1975 and 10 national championships during the reign of coach John Wooden, or the Princeton University men's football team from the pre-NCAA football years of the 1890s (it was one of the two teams to play the first college football game) all the way until 1950, during which they won 28 national championships, or the Yale University men's football team, which won 27 recognized national football championships between 1872 and 1926. The Port Stephens Pythons in Australian limited-overs cricket have also forged their own Dynasty winning eleven Major Premierships from fifteen Grand Final appearances in their 19-year history in the top grade. They have even managed to secure "three-peat" premierships on three separate occasions which outshines that of the Chicago Bulls throughout the 90s and the LA Lakers in the start of the millennium.
Some leagues maintain official lists of dynasties, often as part of a hall of fame (e.g., National Hockey League), but in many cases, whether a team has achieved a dynasty is subjective. This can result in frequent topic of debate among sports fans due to lack of consensus and agreement in the many different variables and criteria that fans may use to define a sports dynasty.