What is the meaning of Emanation?

The act of flowing or proceeding (of something, quality, or feeling) from a source or origin.

That which issues, flows, or proceeds from any object as a source; efflux; an effluence.

(physics, chemistry) The element radon (Rn)

The generation of the Son and the procession of the Holy Spirit, as distinct from the origination of created beings.

Source: wiktionary.org