Definition of "Volunteer"

US Department of Labor defines volunteer as: “An individual who performs hours of service for a public agency for civic, charitable, or humanitarian reasons, without promise, expectation or receipt of compensation for services rendered” See full statement

Fair Standards Labor Act – Volunteers: 

“How to Determine if an Individual Is a Volunteer or an Employee,” SHRM, 

“Employee or Volunteer? What’s the Difference,” Nonprofit Risk Management Center.