Definitions:

1. a voluntary gift , as of money or service or ideas, made to some worthwhile cause noun
   • I made our annual contribution to the charity.
2. a writing for publication especially one of a collection of writings as an article or story noun
   • My contribution is coming out in the next issue.
3. an amount of money contributed noun
   • I expected that my contribution be repaid with interest.
4. the part played by a person in bringing about a result noun
   • I am proud of my contribution in advancing the project.

Synonyms:

• donation
• part
• share