(idiomatic) An intensifier, often used after an interrogative word.
What in the world was that?
Who in the world would want to do that?
Used for emphasis after a qualified noun.
Synonym: on the face of the earth
the happiest girl in the world
(religion) In this present age; here and now.
(religion) Characteristic of wider society; worldly.
Nothing great in the world was accomplished without passion. Georg Wilhelm Friedrich Hegel
The biggest obstacle in life is fear. The ugliest feeling is hate. The biggest mistake is to give up. The most beautiful gift is forgiveness. The greatest strength is faith. The most beautiful thing in the world is love. Pavle (Serbian)
The hardest thing in the world to understand is the income tax. Albert Einstein
There are no secrets in the world. Thai Proverb
In the world all things are two and two. Tanzanian Proverb
He who has not traveled thinks that his mother is the best cook in the world. Kiganda Proverb