Metonym & Toponym <https://en.wikipedia.org/wiki/Metonymy> <https://en.wikipedia.org/wiki/Toponymy>.

"Silicon Valley":

As more high-tech companies were established across San Jose and the Santa Clara Valley, and then north towards the Bay Area's two other major cities, San Francisco and Oakland, the term "Silicon Valley" came to have two definitions: a narrower geographic one, referring to Santa Clara County and southeastern San Mateo County, and a metonymical definition referring to high-tech businesses in the entire Bay Area.[citation needed] The name also became a global synonym for leading high-tech research and enterprises, and thus inspired similarly named locations, as well as research parks and technology centers with comparable structures all around the world.

<https://en.wikipedia.org/wiki/Silicon_Valley>