Ru ‧ bik's Cube /ˈruːbɪks ˌkjuːb/ BrE AmE ( also Rubik Cube ) trademark
a type of toy consisting of a ↑ cube with nine smaller coloured cubes on each side. The small cubes must be turned so that each side of the toy shows one colour only. Rubik's Cube was a very popular toy in the 1970s.