[slg]

The dictionary definition is just the ability to take action over something. It sounds like you are using a definition that relies on consciousness which is a much more complicated and vague concept.

For example, I think most people would agree that my pet cat has agency. It can go wherever it wants in my home, eat whenever it wants, sleep whenever it wants, etc. Whether it has consciousness is a much more controversial topic. Basically everything living has agency. Even my houseplant will direct its leaves toward the sun, but few would argue it has consciousness.