Website
Say it like this
A group of pages that share one address on the internet.
For the grown-up
A website is a group of pages that share one internet address. Your browser asks a server for a page, then shows the words and pictures on your screen.
The easy mistake
Careful here. A website is not the whole internet. It is one place on the internet, and somebody chose what goes there.
The full explanation
What Is a Website?
A glossary entry is the short version. This one has the child explanation, the grown-up explanation, the questions and an activity.
Read itWords next to this one
Internet
Computers talking to other computers. All of them, all over the world, all the time.
Browser
The window you look at websites through. It goes and fetches the page, then shows it to you.
Server
A computer that stores information and sends it when another computer asks.
Search Engine
A helper that already went and looked at nearly everything, so it can tell you where to go.