1. A topic, problem, or concern that was once important or relevant but has been neglected, overlooked, or abandoned over time
Climate change in developing nations remains a forgotten issue in international politics.
A mudança climática nos países em desenvolvimento continua sendo uma questão esquecida na política internacional.
2. A matter that has lost public attention or media coverage despite its ongoing significance
Mental health in prisons is often a forgotten issue that deserves more attention.
A saúde mental nas prisões é frequentemente uma questão esquecida que merece mais atenção.