1. to give money, time, effort, or something else of value to help achieve or provide something
2. to help cause something to happen or exist
3. to write articles or provide content for a publication

Examples

• She decided to contribute $100 to the charity.
• Many factors contribute to climate change.
• He contributes articles to the local newspaper.
• Everyone should contribute to the team effort.
• Poor diet can contribute to health problems.
• The author contributed a chapter to the book.
• Volunteers contribute their time to help others.