1situated above another part:his upper armthe upper atmosphere
higher in position or status:the upper end of the social scale
2situated on higher ground.
situated to the north: [in place names]:Upper California
3 Geology & Archaeology denoting a younger (and hence usually shallower) part of a stratigraphic division or archaeological deposit or the period in which it was formed or deposited:the Upper Paleolithic age
1the part of a boot or shoe above the sole.
2 (uppers) upper dentures or teeth.
have (or gain) the upper hand
have or gain advantage or control over someone or something.
on one's uppers
informal, chiefly British extremely short of money.