A transliteration of the Russian surname Королёв (Koroljóv). / A metonym for a person / Short for Sergei Korolev., also referred to as "The Chief Designer" due to Soviet secrecy.

A strap-on booster rocket separation maneuver, where four strap-on boosters are ejected at the same time in four directions 90-degrees/diametrically opposed to each other, forming a cross of exhaust plumes.

plural of Korolev cross