They extended their territory by conquest.

He is planning to develop his business.

His company is extending its business.

The city is planning to extend the boardwalk.

The park was extended to the river.

We decided to branch out into selling some foodstuffs.

The school gymnasium was enlarged.

We thought their shop was a failure, but now they've gotten out from under and even expanded.

There is a scheme to expand the company.

With Windows, you have to have extensions or it won't read your files.

It was once said that "peace" called for the expansion of arms. Now it is said that "peace" calls for the reduction of arms. I wonder what "peace" would say if she heard that?