up‧per 1 W2 / ʌpə $ -er / 形容词 [仅用于名词前]

1 in a higher position than something else 反义词 lower :

the upper lip

2 near or at the top of something 反义词 lower :

the upper floors of a building

There is an upper age limit for becoming a pilot.

3 have/gain the upper hand to have more power than someone else, so that you are able to control a situation :

Police have gained the upper hand over the drug dealers in the area.

4 more important than other parts or ranks in an organization, system etc :

the upper echelons (= the most important members ) of corporate management

5 further from the sea or further north than other parts of an area :

the upper reaches of the Nile

→ a stiff upper lip at stiff 1 ( 10 )