1. An assessment or judgment made in a casual, unstructured manner without formal procedures or documentation
The teacher conducted an informal evaluation of the students' progress through classroom observation.
A professora realizou uma avaliação informal do progresso dos alunos através da observação em sala de aula.
2. A non-official appraisal of performance, quality, or competence
The manager gave an informal evaluation of the new employee's work during their coffee chat.
O gerente deu uma avaliação informal do trabalho do novo funcionário durante seu bate-papo informal.