1. To accelerate or increase in speed, force, or intensity toward the conclusion of something
The runner began to gain momentum at the end of the race and overtook the leader.
O corredor começou a ganhar impulso no final da corrida e ultrapassou o líder.
2. To increase in strength, support, or progress as something approaches completion
The political campaign gained momentum at the end of the election cycle.
A campanha política ganhou impulso no final do ciclo eleitoral.