someone who originates or causes or initiates something; " he was the generator of several complaints"

anything that provides inspiration for later work

a publication ( or a passage from a publication) that is referred to; " he carried an armful of references back to his desk"; " he spent hours looking for the source of that quotation"

a facility where something is available

a document ( or organization) from which information is obtained; " the reporter had two sources for the story"

anything ( a person or animal or plant or substance) in which an infectious agent normally lives and multiplies; " an infectious agent depends on a reservoir for its survival"

( technology) a process by which energy or a substance enters a system; " a heat source"; " a source of carbon dioxide"

specify the origin of; " The writer carefully sourced her report"

get ( a product) from another country or business; " She sourced a supply of carpet"; " They are sourcing from smaller companies"

The act of rising; a rise; an ascent.

The rising from the ground, or beginning, of a stream of water or the like; a spring; a fountain.

That from which anything comes forth, regarded as its cause or origin; the person from whom anything originates; first cause.

That from which anything rises; a spring; first cause.

That from which anything rises or originates: origin: the spring from which a stream flows.

Origin; spring; that which supplies.

That from which anything proceeds; origin; fountainhead.

The spring or fountain from which a stream of water flows; first cause; original; the first producer.

The spring or fountain from which a stream of water flows; first cause; original; that which gives rise to anything.

The arrival of my family was a source both of pleasure and pain to me. – Valerie by Frederick Marryat

They are a constant source of trouble and annoyance to their master and to their comrades. – Mentally Defective Children by Alfred Binet Théodore Simon

His uniform was a source of extreme pleasure to him. – The Chronicles of a Gay Gordon by José Maria Gordon

" There is the source of the trouble," Venner said. – The Mystery of the Four Fingers by Fred M. White

The true Source of Supply. – New and Original Theories of the Great Physical Forces by Henry Raymond Rogers

This action became the source of much trouble. – Benjamin Franklin by John Torrey Morse, Jr.

This was confirmed with the source book. – Mr. Hogarth's Will by Catherine Helen Spence

This declaration was a source of great comfort to the girl, and a great help towards its own justification; as Mr. Digby probably guessed. – A Letter of Credit by Susan Warner

I was expecting dispatches, important ones, but from another source. – The Courier of the Ozarks by Byron A. Dunn

" I believe it would be better for you if this colonel of pandours were not your relation," said the king thoughtfully; " there can no good come to you from this source, but only evil." – Berlin and Sans-Souci by Louise Muhlbach

This, in fact, is the sole source of any positive value. – The Life of Michelangelo Buonarroti by John Addington Symonds

But all the same, I've a notion I can trace that bottle to its source." – The Come Back by Carolyn Wells

He knew no source from which the widow could get the money. – Herbert Carter's Legacy by Horatio Alger

As for the third source, I have never expressed an opinion. – A Quantitative Study of the Nocturnal Migration of Birds. Vol.3 No.2 by George H. Lowery.

With much trouble I induced him to regard you as a source of profit. – Denzil Quarrier by George Gissing

But that's not always a source of suffering. – The Spoils of Poynton by Henry James

The mother ended the scene by turning on Alfred: You have almost broken my heart, you are a constant source of trouble and worry to me and as if that were not sufficient, your father's people must force themselves into our affairs as they always have done since I married into the family. – Watch Yourself Go By by Al. G. Field

And it may show us a source for a good deal of the material of dreams and dream states. – The Glands Regulating Personality by Louis Berman, M.D.

Her new house has not been a source of much pleasure to her yet, has it? – The Lamplighter by Maria S. Cummins

My dear mother assured me that it was not from any human source that she had learned the tidings, and went on to tell the little incident mentioned above. – A Retrospect by James Hudson Taylor