There are multiple definitions - click on the translation that matches your context.

席位

名词

full

seat

noun

Definitions of seat

an official position as a member of a committee, council, board of directors or legislative body etc.

He gave up his seat on the Legislative Council.

having a seat on a stock exchange, especially in the US, means that you are a member of that stock exchange and are allowed to buy and sell shares

These seats are a sought-after commodity as they confer the ability to directly trade stock on the NYSE (=New York Stock Exchange).

the site or location of something, especially something official or a business entity etc

The voyage was booked through Sniegon Travel, a company whose seat is located in Poland.