Cal king noun2 •(informal) A California king (a large bed measuring 72 × 84 inches).Only when she was wearing her nightgown and ensconced in the Cal King bed with a lot of pillows did she call Richie. He didn't answer, which was odd. — 2023 •(informal) The California kingsnake (Lampropeltis getula californiae, a nonvenomous colubrid snake endemic to the western United States and northern Mexico).Adult Cal kings average about 4 feet (1.2 m) in length, so an enclosure similar in size to a 20-gallon (76-L) aquarium is fine for them. — 2007 formsCal kings