What does ‘antiaging’ really mean?

Would someone define “antiaging,” please?

One of the difficulties inherent in running Longevity Medical Clinic is that I never know exactly how to describe my practice. I don't particularly like the term “antiaging” because I'm not exactly sure what it means. Obviously we all connect emotionally with the idea of looking, feeling and functioning as though we were younger than we are – it’s a compelling thought, one that has been around for centuries. But the obvious reality is that we can’t truly reverse our age: that, as any sci-fi fan knows, involves warping space and time, and somehow shifting us to an earlier point in the space-time continuum. While the quantum physics folks tell us that subatomic particles do this on a regular basis, I'm somewhat at a loss as to how to do it with an intact human being.