Traslation of صلّى in more contexts pls answer

Salamo3alaykom, as I've asked some minutes ago, I'd like to ask about the meaning of the word or verb صلّى and what I may have understood is that it can mean "praying" or also "sending blessings". Can someone clarify? I've found it quite strange when I've read the traslation of certain ahadith. For example in the tashahhud in a part we say Allahumma salli 3ala Muhammad wa 3la ali Muhammadin, kama sallayta 3la Ibrahim wa 3la ali Ibrahim, Wa barik 3la Muhammad wala 3ali Muhammad[...]" Now I want to ask, what does "salli" exactly mean in this context? I know that Salah means prayer but Allah subhana wa ta'ala does NOT pray on Muhammad since He Is Allah the All-Mighty. So Allah DOES NOT PRAY BECAUSE HE IS THE ALL MIGHTY! Can someone clarify this thing for me please? Jazakon Allah