1. A narrow street or alley that is closed at one end, with no exit or passage through
The car drove into a dead end and had to turn around.
O carro entrou em um beco fechado e teve que dar a volta.
2. A situation or circumstance with no way out or solution; an impasse
The negotiations reached a dead end when both parties refused to compromise.
As negociações chegaram a um beco fechado quando ambas as partes se recusaram a fazer concessões.