I 5 migliori aeroporti al mondo sono in Asia

Migliore = “better / best”

“Migliore” can be both the comparative and the superlative form of the adjective “buono” (good) in Italian, depending on the context.

As a comparative adjective, it is used to compare two things, indicating that one is better than the other. In this case, “migliore” is translated as “better” in English:
– Questo ristorante è migliore di quello. (This restaurant is better than that one)

As a superlative adjective, it is used to indicate the highest degree of quality among a group of thing or people, as in this article. In this case, “migliore” is translated as “best” in English:
– Questo è il migliore ristorante della città. (This is the best restaurant in the city.)