1. The act of offering one's services or time freely, typically for charitable or community work without payment
She is passionate about volunteering at the local animal shelter.
Ela é apaixonada por voluntariado no abrigo de animais local.
2. Offering or proposing oneself or one's services for a task or cause
He is volunteering his expertise to help with the project.
Ele está oferecendo sua expertise para ajudar com o projeto.
3. Present participle of volunteer; giving information or assistance willingly
The witness was volunteering information to the police.
A testemunha estava oferecendo informações à polícia.