Definition of stakeholder noun in Oxford Advanced Learner's Dictionary. Meaning , pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. STAKEHOLDER definition : 1. a person or group of people who own a share in a business 2. a person such as an employee…. Learn more. Stakeholders are people or groups with an interest in the success of a business or project. Learn about the types of stakeholders and their roles. Learn about stakeholders , their types, roles, and importance. Study the stakeholder meaning , stakeholder theory & difference between stakeholders and shareholders.