1. A data field in a form, database, or system that is anticipated or required to be present or filled in
The expected field for the user's email address was left blank in the form submission.
O campo esperado para o endereço de e-mail do usuário foi deixado em branco no envio do formulário.
2. In programming and data validation, a field whose presence or specific format is anticipated by the system
The API returns an error when an expected field is missing from the JSON response.
A API retorna um erro quando um campo esperado está faltando na resposta JSON.