a.[Z][B]

1. （地點，位置等）較高的；上面的；上首的
   He has a scar on his upper lip.

   他的上脣有一道疤痕。

2. 上游的；內地的；北部的
   the upper reaches of the Mississippi River

   密西西比河上游

3. （地位，等級）較高的；上層的；上流的
   This part of town is where the upper class live.

   鎮上這個地區是上層階級的人住的。

4. 上院的，參議院的

n.[C]

1. 鞋幫
2. 【口】上舖
3. 上齒
4. 上排假牙[P]
5. 【俚】興奮劑（安非他命）

adj.

1. situated above another part.
   ▸higher in position or status.
   ▸ (often Upper) Geology  & Archaeology  denoting a younger (and hence typically shallower) part of a stratigraphic or archaeological division:

   the Upper Palaeolithic.
2. situated on higher ground.
3. [in place names] situated to the north.

n.

n.