Definitions: (adjective) Voluntary work is work without payment. (adjective) Something that somebody does is voluntary if the person is doing it because they want to do it, not because someone orders them to do it.
Examples: (adjective) Many people do voluntary work to help the homeless in the city. (adjective) In some countries, children aren’t forced to go to school, it is voluntary.
Synonyms: adjectives: optional, free, independent. free.
Academic Word List Sublist and Group: 7 A