1. To gradually increase in speed, momentum, or intensity
The project started slowly, but it began to pick up steam after we hired more staff.
O projeto começou lentamente, mas começou a ganhar velocidade depois que contratamos mais pessoal.
2. To become more popular, successful, or active
The campaign is picking up steam as more people become aware of it.
A campanha está ganhando impulso conforme mais pessoas ficam cientes dela.