A natural event that involves a change in the position or location of something

Usage examples of motion.

These observations arose out of a motion made by Lord Bathurst, who had been roughly handled by the mob on Friday, for an address praying that his majesty would give immediate orders for prosecuting, in the most effectual manner, the authors, abettors, and instruments of the outrages committed both in the vicinity of the houses of parliament and upon the houses and chapels of the foreign ministers.

But to live mechanised and cut off within the motion of the will, to live as an entity absolved from the unknown, that is shameful and ignominious.

There is no way of distinguishing an accelerated motion from a gravitational field force, right?

The observations of such individuals will be more complicated to analyze than those of constant-velocity observers, whose motion is more serene, but nevertheless we can ask whether there is some way of taming this complexity and bringing accelerated motion squarely into our newfound understanding of space and time.

We can imitate the effect of gravity through suitably accelerated motion.

On the other hand, accelerated motion, although somewhat more complicated than constant-velocity motion, is concrete and tangible.

Achieving this end required that Einstein forge a second link in the chain uniting gravity and accelerated motion: the curvature of space and time, to which we now turn.

In the example of the terrorist bomb, we learned that gravitational forces are indistinguishable from accelerated motion.

Einstein significantly extended this symmetry by showing that the laws of physics are actually identical for all observers, even if they are undergoing complicated accelerated motion.

Recall that an object is accelerating if either the speed or the direction of its motion changes.

Thenceforth, he contented himself with quick looks and glances, easily interpreted, or by some acquiescent motions of his hands, when such could be convenient, to emphasise his idea of the correctness of any inference.

The government resisted this, and Lord John Eussell, with a tone of ridicule and acrimony, offered the motion an ostentatious opposition.

If on the other hand by this actualization it is meant that he is Act and Intellection, then as being Intellection he does not exercise it, just as movement is not itself in motion.

Then, for the first time, I felt acutely the coolness, motion, and dampness of the surrounding air.

But the strongest argument in their favour was that adduced by Lord Althorp, which was to the effect, that, if his motion were lost, it would upset the ministry.