Wiktionary
n. A universal statement about both nature and society, based on empirical observations of physical behavior, tested using scientific method.
Wikipedia
A physical law or scientific law is a theoretical statement " inferred from particular facts, applicable to a defined group or class of phenomena, and expressible by the statement that a particular phenomenon always occurs if certain conditions be present." Physical laws are typically conclusions based on repeated scientific experiments and observations over many years and which have become accepted universally within the scientific community. The production of a summary description of our environment in the form of such laws is a fundamental aim of science. These terms are not used the same way by all authors.
The distinction between natural law in the political-legal sense and law of nature or physical law in the scientific sense is a modern one, both concepts being equally derived from physis, the Greek word (translated into Latin as natura) for nature.
Usage examples of "physical law".
I define a miracle as an action that clearly breaks known physical law.
There is a drive toward com-plexification that is directly opposed to the physical law of entropy.
For that's what Maxwell's equations said, and being a physical law, it had to apply in all frames for (1) to be true.
Under a simple physical law, if he was up in the fencing loft,then he was not down on the football field, with sadistic gorillas in hobnailed boots jumping up and down on him.
Under a simple physical law, if he was up in the fencing loft, then he was not down on the football field, with sadistic gorillas in hobnailed boots jumping up and down on him.
He admitted to himself that the original failures of the deKalbs should have been considered just as overwhelmingly upsetting to physical law as the unique behaviour of these two.
As with the physical law of gravity, their enormous mass drew the individual human atoms to itself.
First, it is not a physical law, but merely an enumeration of factors.
If you don't know that you can't do something, isn't there a remote possibility that you'll go ahead and do it anyway in absolute defiance of physical law?
Yet, by their very natures, machines were supreme manifestations of applied physical law.