What is an intention?

As I begin writing my thoughts on setting an intention the sun is setting and I can see this straight through my bedroom window. I think about the day just gone and go back to how I started this morning. During my meditation this morning I felt strongly connected to my feet. I felt them positively heavy an steady. So my intention was to stay with that grounded feeling during the day. Did I manage? Most of the time yes, but sometimes my thoughts were a little unstable. But as I end this day I am back to that solid grounded feeling as the sun sinks into the earth.