1.Definition: (technology) a process by which energy or a substance enters a system

"A heat source", "A source of carbon dioxide"

Category: General

2.Definition: a document (or organization) from which information is obtained

"The reporter had two sources for the story"

Category: General

3.Definition: a facility where something is available

Category: Objects

4.Definition: a person who supplies information

Related Noun(s):informant

Category: People

5.Definition: 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"

Related Noun(s):reference

Category: General

6.Definition: anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies

Related Noun(s):reservoir

Category: Objects

7.Definition: anything that provides inspiration for later work

Related Noun(s):germ, seed

Category: General

8.Definition: someone who originates or causes or initiates something

Related Noun(s):author, generator

Category: People

9.Definition: the place where something begins, where it springs into being

"The Italian beginning of the Renaissance", "Jupiter was the origin of the radiation", "Pittsburgh is the source of the Ohio River", "Communism's Russian root"

Related Noun(s):origin, root, rootage

Category: Places