The short answer is that the meaning of "get" changes depending on the following word.
If you get a thing, you receive or even take it.
If you get somewhere, you arrive at that place.
If you get [adjective], it means you change to, or become the state of that adjective.
Sometimes "get" is part of a phrasal verb, and therefore the phrasal verb has its own meaning.
By the way, the phrase "what means" doesn't exist in native English - not in questions, not in statements.
"What does ____ mean?"
"I have a question about what the word GET means..."
"I know what the words after GET mean..."