1.Definition: (used of computers) operating properly
"How soon will the computers be up?"
2.Definition: (usually followed by `on' or `for') in readiness
"He was up on his homework", "Had to be up for the game"
3.Definition: being or moving higher in position or greater in some value; being above a former position or level
"The anchor is up", "The sun is up", "He lay face up", "He is up by a pawn", "The market is up", "The corn is up"
4.Definition: extending or moving toward a higher place
"The up staircase", "A general upward movement of fish"
5.Definition: getting higher or more vigorous
"Its an up market"
"The windows are up"
7.Definition: out of bed
"Up by seven each morning"
8.Definition: used up
"Time is up"