1. A journey, expedition, or day's work that ends unsuccessfully or without achieving its intended goal
The expedition was a failed journey when they had to turn back due to bad weather.
A expedição foi uma jornada malograda quando tiveram de retroceder devido ao mau tempo.
2. A wasted or fruitless effort in travel or a planned activity
His business trip turned out to be an unsuccessful venture.
Sua viagem de negócios se mostrou uma jornada malograda.