A source of application means the source in which an application is found. Examples of the source of an application is the internet or directly from a company.

Remote Desktop is proprietary; the source code is not available.

"Source of living" in Mangyan dialect can be translated as "Pagmangayagi."

Where a river begins is its source. It could begin at a mountain lake or as a branch of another river.

The sun is the ultimate source of all energy in Earth's ecosystems.