1
- situated above another part较高的, 较上的：
his upper arm
他的上臂
the upper atmosphere.
高层大气。
1.1
- higher in position or status（职务, 地位）较高的：
the upper end of the social scale.
社会等级的高端。
2
- situated on higher ground地势较高的。
2.1
- situated to the north北部的：
in place names Upper California上加利福尼亚。
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【地质, 考古】晚期的, 较近期的：
the Upper Palaeolithic age.
旧石器时代晚期。
- the part of a boot or shoe above the sole鞋帮。
短语
have（或gain）the upper hand
- have or gain advantage or control over someone or something占上风, 取得优势。
on one's uppers
- informal extremely short of money〈非正式〉极度穷困的。
the upper crust
- informal the upper classes〈非正式〉上层阶级。
词源