1. A tune, song, or musical composition that has been forgotten or is no longer remembered or played
That forgotten melody from childhood suddenly came back to me.
Aquela melodia esquecida da infância de repente voltou à minha memória.
2. Figuratively, something from the past that is no longer relevant or has lost its appeal
The old love song became a forgotten melody in her heart.
A velha canção de amor tornou-se uma melodia esquecida em seu coração.