1. reflection (of light)
2. reflection (of society, attitudes, etc.)
この考え方は、その人の人生に反映される。This way of thinking is reflected in that person's life.
3. application (of an update, changes, etc.); taking effect
修正の反映を半分ほど終えて一息ついた。I took a breather after completing about half of the application of the fixes.