contribution

noun

1. the effort contributed by a person in bringing about a result"I am proud of my contribution in advancing the project"
2. a voluntary gift (as of money or service or ideas) made to some worthwhile cause
3. act of giving in common with others for a common purpose especially to a charity
4. an amount of money contributed"he expected his contribution to be repaid with interest"
5. a writing for publication especially one of a collection of writings as an article or story