[n] a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
[n] piece of leather that forms the part of a shoe or boot above the sole
[n] the higher of two berths
[adj] higher in place or position; "the upper bunk"; "in the upper center of the picture"; "the upper stories"
[adj] superior in rank or accomplishment; "the upper half of the class"
[adj] the topmost one of two