2. Noun. By analogy with magic square, an n-by-n-by-n arrangement of n³ numbers such that the numbers in each row, in all columns (horizontal and vertical) and in all main diagonals (of which there are 6*n+4) each have the same sum. ¹
3. Noun. (trademark possibly registered) Rubik's cube ¹
¹ Source: wiktionary.com