1.
If you describe something as ~, you mean that it is the best thing of its kind.
These resorts, like Magaluf and Arenal, remain ~ in terms of price.
...~ Italian cars.
ADJ emphasis
2.
In a game or competition, if you describe a person or team as ~, you mean that they win so often, or perform so well that they are unlikely to be beaten by anyone.
The opposition was ~...
With two more days of competition to go China is in an ~ position.
= invincible
ADJ