Prepositions with nouns

Using “world” with prepositions

“In the world” is a common expression for location or scope. “Of world” is usually incomplete unless another word modifies “world,” such as “of the world” or “world of.”

Quick answer

Which form is correct?

Use “in the world” to talk about something existing or happening globally or within human experience. “Of world” by itself is generally not standard English. English usually needs “of the world,” “world of,” or another modifier.

She is one of the best players in the world.
They discussed major problems in the world today.
He dreams of a world of peace and cooperation.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
in the world

Talking about global scope or existence

Use “in the world” to mean anywhere on Earth or within all known experience.

What is the tallest building in the world?
There are many cultures in the world.
2
of the world

Describing belonging or connection

Use “of the world” to describe something connected with the world or worldly life.

She has a deep understanding of the world around her.
They studied the history of the world economy.
3
world of + noun

Describing a type of environment or experience

Use “world of” before a noun to describe an area full of a particular activity, feeling, or subject.

The book opens a world of possibilities.
Children entered a world of imagination.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
in the world
She is famous in the world of fashion.
Used for global scope or within a particular field.
of world
This phrase is generally incomplete in standard English.
English normally requires “the” or another structure such as “of the world” or “world of.”
of the world
They discussed the problems of the world.
Shows connection with the world or human society.
world of
He entered the world of politics.
Refers to a field, environment, or sphere of activity.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using “of world” without an article

The noun “world” usually needs an article or a different structure after “of.”

✕ the problems of world ✓ the problems of the world

Confusing “in the world” and “world of”

“In the world” refers to location or scope, while “world of” introduces a type of experience or field.

✕ a in the world of dreams ✓ a world of dreams

Leaving out “the” in fixed expressions

Many common expressions use “the world.”

✕ best player in world ✓ best player in the world

Quick practice

Choose the expression that matches the intended meaning.

1. She is one of the most respected scientists ___ the world.
2. The museum offers a world ___ art and history.
3. They talked about the future ___ the world.

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Frequently asked questions

Is “of world” ever correct?

It is uncommon by itself in standard English. English usually uses “of the world,” “world of,” or a modified form such as “of world history.”

Why do people say “in the world”?

The phrase refers to the whole world or to all known experience, as in “the best restaurant in the world.”

Can “world” be used without “the”?

Yes, but usually in special structures such as “world history,” “world peace,” or “a world of opportunities.”

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