A document (or organization) from which information is obtained

Usage examples of source.

Could it have been from one of these sources that he derived his accurate longitudes?

Let us therefore not attempt to dislodge the Greek astronomer from his pedestal as the discoverer of precession unless we can find a significantly more accurate value recorded in a significantly more ancient source.

By preference, they seem to dwell about the sources of the Igatimi, an affluent of the Parana, and in the chain of mountains known either as San Jose or Mbaracayu.

It being taught in the Mysteries, either by way of allegory, the meaning of which was not made known except to a select few, or, perhaps only at a later day, as an actual reality, that the souls of the vicious dead passed into the bodies of those animals to whose nature their vices had most affinity, it was also taught that the soul could avoid these transmigrations, often successive and numerous, by the practice of virtue, which would acquit it of them, free it from the circle of successive generations, and restore it at once to its source.

The one unexplained allele he had found on 22 might not be the source of the problem.

As head of the Triplanetary Service he took a leading part in the brief war with the Nevians, a race of highly intelligent amphibians who used allotropic iron as a source of atomic power.

As head of the Triplanetary Service, he took a leading part in the brief war with the Nevians, a race of highly intelligent amphibians who used allotropic iron as a source of atomic power.

The light of our world can be allocated because it springs from a corporeal mass of known position, but conceive an immaterial entity, independent of body as being of earlier nature than all body, a nature firmly self-based or, better, without need of base: such a principle, incorporeal, autonomous, having no source for its rising, coming from no place, attached to no material mass, this cannot be allotted part here and part there: that would be to give it both a previous position and a present attachment.

The thrill of finding an allusion, of locating the precise source of a teasing echo, of suddenly catching an obscure pun or seeing what should have been an obvious joke makes the reader alert, curious, eager to find new puzzles to solve.

Whether or not she realized it, she was an invaluable source of information, Ambrose thought, turning a page of the newspaper.

They grow beards and long hair, and, since they have one of the best available sources of dope and any kind of weapons, they easily become influential within Anarchist circles.

As often as the fancy had, compelled by the lady herself, crossed the horizon of his thoughts, a repellent influence from the same source had been at hand to sweep it afar into its antenatal chaos.

The belief that the stars were living beings, combining with the fancy of an unscientific time, gave rise to the stellar apotheosis of heroes and legendary names, and was the source of those numerous asterisms, out lined groups of stars, which still bedeck the skies and form the landmarks of celestial topography.

Still, that I was not apprized, each hour, of her condition, that her state was lonely and sequestered, were sources of disquiet, the obvious remedy to which was her coming to New-York.

Note the assevered source of the report-- One beyond thought of minters of mock tales.