My head tilting ever so slowly backward to allow myself to see more of this person.

It started to tilt backward, away from the building.

The chair back tilts backward on hinges to become a set of library steps.

In the sitting position, it becomes relaxed, thus permitting the pelvis to tilt backward into its sitting position.

If it tilts backward, tighten the front straps.

Tilting backward in my desk chair, I finally relented and told my fellow sleuths what was up.

The vertical body axis alternates between tilting forward and backward.

Tilting backward, Dagbar lost his balance; his arms spread wide as he flattened, face upward.

The cups are lined with small ridges that tilt backward.

Cathy could feel his body tilting backward against the angle, his feet slipping in the muddy stream of water running down the path.