Aging well. It’s something that we talk about a lot and that we all want in our lives. But what do we mean by aging well? How can we know whether we are aging well at any given moment in time? NCOA and the 100 Million Healthier Lives Initiative have teamed up to get individuals talking about their definitions of aging well and discuss what matters most to them. The Adult Well-Being Assessment is one approach for gauging how individuals feel about their aging experience.