The crossword solution for the term 'MAJOR TIME' is ERA, which stands for 'Eonothemic Reference Axis'. ERA is a geologic time scale that divides Earth's history into different eras. It is used to classify and organize geological events, such as the formation of mountains, the evolution of life forms, and the extinction of species. ERA is divided into three major divisions: the Paleozoic, Mesozoic, and Cenozoic eras.