Wiktionary
n. work done voluntarily.
Usage examples of "voluntary work".
I do voluntary work three evenings a week for the Junior Anti-Sex League.
I began to wonder whether Glenys was going to give up her voluntary work.
And yet, for all her voluntary work and the eagerness with which she helped Steed build a real house, she was somehow reserved in her relations with him.
Her first husband, an optician, had died a year before she met Harry, and all she had done, apart from short excursions into voluntary work, was keep house for the two of them.
In his absence, she had taken up voluntary work as a pharmaceutical dispenser at her local hospital in Torquay and there learned all about drugs, medicines and the power of poisons.
Some people suggest that the young unemployed should do voluntary work to help others, but I feel that is only appropriate if they are naturally compassionate - and compassion is rare among the young.