upsiden.1. The upper side; the part that is uppermost.()2. the benefits; the positive features; -- said of a situation or event that has both positive (good) and negative (bad) aspects.()To be upsides with, to be even with. [Prov. Eng. & Scot.] Sir W. Scott. T. Hughes. -- Upside down. [Perhaps a corruption of OE. up so down, literally, up as down.] With the upper part undermost; hence, in confusion; in complete disorder; topsy-turvy. Shak.()These that have turned the world upside down are come hither also. (Acts xvii. 6.)