Autumn or autumn?

These two different expressions have different meanings.

"Autumn" usually refers to the season or region that has passed through autumn, but it has not really experienced or felt the beauty or characteristics of autumn. For example, "I just passed by in autumn, and I didn't see the leaves change color or feel the cool weather."

"Walking through autumn" is to experience or appreciate the beauty or characteristics of autumn. For example, "I walked through autumn, saw the leaves change color and felt the cool weather."