I am confused with this sentence 'This is one of the best movies.' Best is used as a superlative for good and there can only be one 'best'. So does that mean the above sentence is wrong? I've seen many sentences like that. Please advise.
The phrase is fine- we can think of a number of movies as being special and above the rest. Mount Everest is the highest mountain in the world, but K2 is one of the highest. That is correct, but it would be wrong to say that K2 (the second highest) is the highest mountain.