Sketching in the sand with a sea shell, Tom went on to describe how the rockets would take off straight upward, then gradually tilt to an easterly course.

In explaining how an ellipse evolves into a parabola, for example, Mr. Seife suggests gradually tilting a flashlight as its beam spreads upon a wall.

North west from the cairn the grassy plateau gradually tilts, until a few yards away it simply disappears over the brink.

The southern division was little more than a narrow fissure in the rock face, shelving away toward the southeast at a gradually tilting angle.

This means that the lake bed is gradually tilting southward, inundating the south shore and turning river valleys into bays.

As he speaks, his head gradually tilts back, as though his brain needs a rest.

The balance of power had been gradually tilting in favour of Ghazni.

The mattress begins tilting gradually after the bedside alarm rings.

As you draw the brush upward, gradually tilt the handle down.

The point of Urthstripe's spear had been gradually tilting.