1. absence of drive, desire, or enthusiasm to do something; the state of not being motivated
His lack of motivation prevented him from completing the project on time.
A falta de motivação dele impediu que terminasse o projeto no prazo.
2. insufficient emotional or psychological incentive to take action or pursue goals
The students' lack of motivation became evident during the exam.
A falta de motivação dos alunos ficou evidente durante o exame.