Upper meaning

the higher of two berths

piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot

“Uppers come in many styles”

a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression

the topmost one of two

higher in place or position

“the upper bunk”

“in the upper center of the picture”

superior in rank or accomplishment

“the upper half of the class”