1. A farewell expression addressed to a group of people; saying goodbye to everyone present or in a general sense
As she left the party, she waved and shouted 'goodbye to all!'
Ao sair da festa, ela acenou e gritou 'adeus a todos!'
2. A final farewell, often implying departure from a place, group, or situation permanently
After thirty years of service, he announced his retirement with 'adeus a todos'
Após trinta anos de serviço, ele anunciou sua aposentadoria com 'adeus a todos'