/ kənˈtrɪbjətə(r); NAmE / noun contributor (to sth)
1.
a person who writes articles for a magazine or a book, or who talks on a radio or television programme or at a meeting
2.
a person or thing that provides money to help pay for sth, or support sth :
Older people are important contributors to the economy.
3.
something that helps to cause sth :
Sulphur dioxide is a pollutant and a major contributor to acid rain.
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WORD ORIGIN
late Middle English : from Anglo-Norman French contributour , from Latin contribut- added, from the verb contribuere , from con- with + tribuere bestow.