1. in a way that is free of charge; without payment
The lawyer provided legal advice gratuitously to low-income clients.
O advogado forneceu consultoria jurídica gratuitamente para clientes de baixa renda.
2. in a way that is uncalled for, unjustified, or unwarranted; needlessly
The violence in the movie was gratuitously excessive.
A violência no filme era excessiva e desnecessária.