The word meditation is an adjective, and that means something highly reflective, contemplated or thoughtful. It also usually requires calmness.
If the definition above is anything to go by, it is the fact that it is a conscious act. It is intentional. In the same vein, to deal with stress and anxiety, you have to be intentional about it.
You cannot talk about stress without ending up with anxiety. This is because both are interwoven, and harmful to the mind and body. Therefore, when you deal with anxiety, you are simultaneously dealing with stress and anxiety.