the property possessed by a line or surface that departs from the vertical; "the tower had a pronounced tilt"; "the ship developed a list to starboard"; "he walked with a heavy inclination to the right"
All. Leaning into a turn is one way to put a board onto a rail and develop a turning surface. It is very intuitive. Even a beginner can feel how to lean into a turn. Leaning can be hard to recover from if you tip over too far.