Voluntary/ˈvɑːlənteri/ Definition 1 of 4Pro Tip 1/3Personal Choice Stresses that the action is taken by someone's own decision, without pressure. He took on the project on a voluntary basis. Pro Tip 2/3Positive Nuance Carries a positive connotation, suggesting generosity or goodwill. Her voluntary work with children earned her great respect. Pro Tip 3/3Not Compulsory Implies that there is no legal or formal obligation involved. Attendance at the seminar is purely voluntary.