B2 a person who does something, especially helping other people, willingly and without being forced or paid to do it:
Since it would be a highly dangerous mission, the Lieutenant asked for volunteers.
It's a volunteer army with no paid professionals.
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- As a volunteer on the childcare project, I really saw life.
- He emphasized that all the people taking part in the research were volunteers.
- We're saving money by using volunteers.
- She placed her name on the list of volunteers.
- Charities such as Oxfam are always trying to recruit volunteers to help in their work.
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C1 [ I or T ] to offer to do something that you do not have to do, often without having been asked to do it and/or without expecting payment:
[ + to infinitive ] During the emergency many staff volunteered to work through the weekend.
I volunteered myself for the position of Health and Safety Representative.
› [ T ] to give information without being asked:
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