1. A day marked by unfortunate, distressing, or unpleasant events
Yesterday was a terrible day; I failed my exam and lost my keys.
Ontem foi um dia terrível; reprovei no exame e perdi minhas chaves.
2. A day characterized by emotional distress, sadness, or frustration
She had a terrible day at work and came home exhausted.
Ela teve um dia terrível no trabalho e chegou em casa exausta.