"Sinal Fechado" is an album by Chico Buarque, released in 1974 during the military dictatorship in Brazil, a period marked by censorship and political repression. This album stands out in Chico Buarque's discography for its subtlety in addressing the socio-political climate of the time, using metaphor and allegory to critique the regime indirectly.

The title track, "Sinal Fechado," is a poignant song about two old friends who meet unexpectedly and find they have nothing to say to each other, symbolizing the communication breakdown and isolation felt under the dictatorship. The album as a whole maintains a tone that reflects the melancholy, introspection, and resilience of the Brazilian people during this dark period.

Musically, the album features a mix of samba, bossa nova, and MPB (Música Popular Brasileira), showcasing Buarque's sophisticated compositions and lyrical prowess. His ability to convey deep emotional and political messages through his music, without overtly defying the censors, earned him both critical and popular acclaim.

"Sinal Fechado" is considered one of Chico Buarque's most important works, capturing a critical moment in Brazilian history and demonstrating the power of music as a form of resistance and commentary. The album's themes of communication, alienation, and subtle resistance resonate well beyond its immediate historical context, making it a timeless piece in Buarque's catalog.