contributor

Etymology

From Anglo-Norman contributour (from Latin contribuō); equivalent to contribute + -or.

noun

1. A benefactor; someone who donates to charity or some cause.
   I am a longstanding financial contributor to Amnesty International.
2. A person who backs, supports or champions a cause, activity or institution.
   He was a regular contributor to Greenpeace protests.
3. A person (or thing) instrumental in the creation or growth of something.
   With her strength and intelligence, she was an important contributor to the victorious effort.
4. A person who produces articles published in a newspaper, magazine, online publication, etc.
   William Safire has been a notable contributor to the op-ed pages of the New York Times for many years.