1. to decrease velocity or pace towards the conclusion of a race, performance, or activity
The runner had to reduce speed at the end due to fatigue.
O corredor teve que reduzir a velocidade no final devido ao cansaço.
2. to slow down a vehicle approaching a destination or finish line
Always reduce speed at the end of the highway before entering the city.
Sempre reduza a velocidade no final da rodovia antes de entrar na cidade.