know

When you have learned something and it is stored in your mind — a fact, an answer, a rule — you 'know' it. Think of it as information that is already inside your head, ready to use.

everyday language · Modern, widely used

She knows the capital of every country in the world.

Do you know what time the train leaves?

I didn't know that water boils at 100°C until my teacher told me.

2verbbeing familiar with a person

When you have met someone and spent time with them, you 'know' them. It is not just about knowing their name — it means you have a real connection or familiarity with that person.

everyday language · Modern, widely used

He doesn't know the new manager very well yet.

Do you know anyone in this city, or are you here alone?

3verbbeing familiar with a place or thing

You can also 'know' a place, a book, a language, or a subject. This means you have experience with it and understand it well — not just that you have heard of it.

everyday language · Modern, widely used

She knows Paris very well — she lived there for three years.

I know this road — I drive it every morning.

everyday language · Modern, widely used

You'll know the building when you see it; it has a bright red door.

Sometimes 'know' means you understand something deeply because you have lived through it or felt it yourself — not just because you read about it.

everyday language · Modern, widely used · figurative

She knows hardship — she grew up with very little.