1. A designated area where noise is restricted or minimized, such as in libraries, hospitals, or residential areas
The library has a quiet zone on the second floor where students can study without distractions.
A biblioteca tem uma zona silenciosa no segundo andar onde os alunos podem estudar sem distrações.
2. An area near railroad tracks where train horns are not sounded unless necessary for safety
The residential neighborhood was designated as a quiet zone to reduce noise pollution from trains.
O bairro residencial foi designado como zona silenciosa para reduzir a poluição sonora dos trens.