There are many terms to describe people of older age: elderly, geriatric, senior citizen, golden years, etc.
What exact age is old is somewhat arbitrary and depends on one’s perspective. In our general population, we do not have proper respect for our elderly, in my opinion. We tend to focus on our youth and discard our seniors. But the essence of the elderly is wisdom—they have lots of experience and could offer extremely helpful advice. I have always enjoyed the elderly and have learned much from them.