Primarily used in a sports context, referring to leagues, especially in football (soccer). After the match, they celebrated their team's place in the top flight.
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Prestige Implication
Implies a level of achievement and recognition within the sports community. The manager's goal is to take the club into the top flight.
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Potential Confusion
Don't confuse 'top flight' with 'first class', which often refers to high-quality services. He aspired to compete in the top flight, not just fly first class.