to put to use; to apply · practical; applied (science, linguistics etc) · application; practical use · (computing) app

The cellphone came with several applications already pre-installed.

What's your favorite iPad app?

However, compared to that in cities, rural use of online news, search engines, online shopping, online banking, online stocks and so on is much lower.

The infrastructure of an application is directly related to its overall performance.

I'm developing an Android application.