How is modern architecture defined?

The concept of "modernity" is very difficult to define. Critics are satisfied with some changes or collocations of the word "modernity" because it can be used to identify the arts of their times, and even if not all those arts, they can identify some of them. Therefore, there is a "modern movement"; "modern tradition"; Modern Times; Modern century: "modern characteristics"; Modernism; Or simply "modern"-this word is obviously a new usage of an old Germanic word, although it may be analogized from the names of the Renaissance and the Enlightenment. "Modern architecture" is a concept with a strong meaning of time stage, which refers to all modern architectural activities, especially the development stage of the whole building since it broke away from the influence of classicism and Renaissance architecture. Time refers to the whole stage from the middle of19th century to the present. But modern architecture is not only a change of ideas, but also a change of means. The most important feature of modern architecture lies in its modernity, from materials to architectural styles and styles. This change is consistent with the changes of the times, and also with the democratization and personalized development of people, which makes architecture no longer seek consistent worship etiquette like traditional classical architecture, but express or show personal style. Modern architecture, including modernism and the new trend after modernism, makes architecture a kind of display.