What does UP mean?

adjective

1. being or moving higher in position or greater in some value; being above a former position or level“the anchor is up”
2. out of bed“are they astir yet?”
3. getting higher or more vigorous“its an up market”
4. extending or moving toward a higher place“the up staircase”
5. (usually followed by `on' or `for') in readiness“he was up on his homework”
6. open“the windows are up”
7. (used of computers) operating properly“how soon will the computers be up?”
8. used up“time is up”