The phrase "world best" can be used in written English, but it is often considered informal or colloquial.
It is more commonly used in spoken English. Example: "She is the world best pianist."
Everyone's here breaking world best times.
So the time is a world best, but the world best is no longer the world record.
Anything she wants, short of another world best.
Bett shattered a world best that stood for 27 years.
You are our whole world, best friend, our everything.
"Unbelievable," Pistorius said, reflecting on the 150m world best that Bolt achieved there two days previously.
Here, for what the exercise is worth, is my own selection of arts world "best-ofs".
CA's proportion of female players is a world-best 22%.
Multinationals are increasingly seeking world-best research wherever that may be.
"She gets satisfaction from running world-best times," said Frank in February, "but that's not fulfilment.
Slater's world-best time of 1 08.20 lowered the previous record held by America's Jessica Long by more than a second.
