Baja CaliforniaBa‧ja Cal‧i‧for‧ni‧a /ˌbɑːhɑː kæləˈfɔːniə $ -ˈfɔːrnjə/ (also Baja)a peninsula (=long thin piece of land) in Mexico that is connected to southern California and goes into the Pacific Ocean. Baja California is a popular place for tourists.