What is along? What is along? Over the length of: walked along the path. On a line or course parallel and close to; continuously beside: rowed along the shore; the trees along the avenue. In accordance with: The committee split along party lines over the issue. Forward; onward: We drove along, admiring the view. Farther along, we passed a hitchhiker. As a companion: Bring your friend along. In accompaniment or association; together: packed an atlas along with other books. See Usage Note at together.With one; at hand: Luckily, I had my camera along. Our guests should be along soon. Informal Advanced to some degree: getting along in years.