1. A casual, unstructured discussion or argument between people on a topic, without formal rules or procedures
We had an informal debate about the best pizza toppings at lunch.
Tivemos um debate informal sobre os melhores acompanhamentos de pizza no almoço.
2. A conversational exchange of differing viewpoints that is more relaxed than an official debate
The informal debate between the two colleagues revealed interesting perspectives on the project.
O debate informal entre os dois colegas revelou perspectivas interessantes sobre o projeto.