noun
top and bottom; upper and lower; up and down
Refers to spatial or positional relationship between upper and lower parts, or the two ends of something.
棚の上下に本を並べた。
I arranged books on the top and bottom shelves.
この図では上下が逆に
In this diagram, top and bottom are reversed.
noun, noun or participle which takes 'suru', intransitive verb
rising and falling; fluctuating; going up and down
Describes movement or change in level, such as prices, temperature, or physical motion. Can be used as a noun or with する.
株価が激しく上下している。
Stock prices are fluctuating wildly.
エレベーターが上下する。
The elevator goes up and down.
noun, noun or participle which takes 'suru', intransitive verb
going and coming back; round trip
Used for movement between two places, especially going and returning along the same route. Often seen in contexts like commuting or traveling between two points.
東京と大阪を上下するビジネスマンが多い。
Many businesspeople travel back and forth between Tokyo and Osaka.
noun
upper and lower classes; ruler and ruled; government and people
Refers to social hierarchy, the relationship between those in power and ordinary people, or between different social strata.
上下の意思疎通が大切だ。
Communication between management and workers is important.
noun
first and second volumes
Used for two-volume sets, such as books or publications, where 上 is the first volume and 下 is the second.
この小説は上下巻で刊行された。
This novel was published in two volumes.
noun
top and bottom; two-piece outfit
Clothing term for a matching set of upper and lower garments, or simply referring to the separate pieces of an outfit.
このスーツは上下で買うとお得です。
This suit is a good deal if you buy the jacket and pants together.