upper

(noun) the higher of two berths. Synonyms: upper berth.

(noun) piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot. Examples: "Uppers come in many styles."

(noun) a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression. Synonyms: amphetamine, pep pill, speed.

(adj) the topmost one of two.

(adj) higher in place or position. Examples: "The upper bunk." "In the upper center of the picture." "The upper stories."

(adj) superior in rank or accomplishment. Examples: "The upper half of the class."