1.
upstream, upper reaches
The upper part of a river, closer to its source.
川の上流に向かった。
We headed upstream.
上流の水は澄んでいる。
The water upstream is clear.
ダムは川の上流に建設された。
The dam was built in the upper reaches of the river.
2.
upper class, high society
The socially or economically privileged class.
上流階級の暮らし。
The lifestyle of the upper class.
上流社会に憧れる。
To aspire to high society.
彼女は上流家庭で育ったので、マナーが身についている。
Because she was raised in an upper-class family, she has good manners.
USAGE: Both senses are common. Context usually makes the meaning clear. When talking about rivers, it pairs with 下流 (downstream). When talking about social class, it pairs with 中流 (middle class) and 下流 (lower class).
COMMON COLLOCATIONS:
- 川の上流: upper reaches of a river
- 上流階級: upper class
- 上流社会: high society
- 上流家庭: upper-class family
Related Words
Antonym:
下流