Meaning

noun the higher of two berths

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

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

originEtymology tree Proto-Indo-European *upó Proto-Germanic *ub Proto-Germanic *upp Proto-West Germanic *upp Old English upp Middle English up Proto-Indo-European *-yōs Proto-Germanic *-izô Proto-West Germanic *-iʀō Proto-Germanic *-ōzô Proto-West Germanic *-ōʀō Old English -ra Middle English -er Middle English upper English upper Inherited from Middle English upper. By surface analysis, up + -er.

Etymology from Wiktionary, CC BY-SA 3.0