a place, person, or thing from which something is obtained
an origin
a cause
a means of supply
a source of wealth
a place of origin; a beginning
somebody or something that initiates or inspires
a person, publication, etc that supplies information, esp at first hand
the point of origin of a stream of water
a generative force; a cause
archaic a spring or fountain
at source
at the point of origin or issue
[Middle English sours via French from Latin surgere: see surge1]