Anyone that has a stake (interest) in some aspect of a business. Customers, stockholders, and government among others, are included...

 

"The public is one of our largest stakeholders."

 

"As a stakeholder in XYZ Company, I receive annual updates as to the state of their business."

 

"Our company's values include all of our employees as key stakeholders."

 

"Years ago, it wasn't uncommon for a stakeholder (modern definition) to be able to drive the first stake in a building venture."