- (idiomatic) Willing to participate in; interested in.
- Are you up for a trip to the library today?
- (idiomatic) Being or due to be evaluated, inspected, judged, considered, sold, etc., in the stated circumstances or by the stated method.
- He is up for reelection next year, so he will try to control his image.
- He is up for second degree murder.
- It's still up for debate.
- She put her jewelry up for auction.
- My car is up for sale.