Baja California

Short definition from Wiktionary

Proper noun

1. 1
   A peninsula in Mexico: A mountainous peninsula of western Mexico between the Pacific Ocean and the Gulf of California; administered as the states of Baja California and Baja California Sur.
2. 2
   A state of Mexico that occupies the northern part of the peninsula.
3. 3
   A province of Mexico, New Spain, North America, created by splitting the colony of California into Baja California and Alta California.