1. The quality or state of being informal; lack of formality or ceremony
The informality of the meeting made everyone feel comfortable.
A informalidade da reunião fez com que todos se sentissem confortáveis.
2. In economics and sociology, economic activities that are not officially registered or regulated
The country struggles with a large informal economy and informalidade.
O país luta contra uma grande economia informal e informalidade.
3. Casual, relaxed manner or behavior in social or professional contexts
His informalidade in addressing the director surprised everyone.
Sua informalidade ao se dirigir ao diretor surpreendeu a todos.