1. to reduce speed or momentum as one approaches the end of a race, competition, or task
The runner began to decelerate at the finish, losing the lead in the final meters.
O corredor começou a desacelerar na reta final, perdendo a liderança nos últimos metros.
2. to slow down one's pace or effort toward the conclusion of an activity
She decelerated at the finish of her workout, cooling down gradually.
Ela desacelerou no final do seu treino, resfriando-se gradualmente.