What is the meaning of the word "oakland"?

Definitions:

  1. A major city in the state of California, USA, situated on the east side of San Francisco Bay, directly across from San Francisco and north San Jose. copy to clipboard NOUN
    • Oakland's Jack London Square is a charming waterfront district with a thriving restaurant and retail scene. copy to clipboard
  2. The largest city in the East Bay region of the San Francisco Bay Area, and serves as a major trade center for the region, particularly through its busy seaport, the Port of Oakland, which is one of the busiest in the country. copy to clipboard NOUN
    • Oakland's bustling cityscape is a vibrant hub of culture and commerce. copy to clipboard