Prayer is when you talk to God. Meditation is when God talks to you. However, both can go together - as you sift away distractions while Praying and get to the stage of Concentration to what you are Praying about Meditation sets in.
“Awareness is the power that is concealed within the present moment. … The ultimate purpose of human existence, which is to say, your purpose, is to bring that power into this world.” Eckhart Tolle Eternal self and temporal self