1.
( informal ) to become gradually more powerful, active, etc. :
His election campaign is beginning to get up steam.
2.
( of a vehicle ) to increase speed gradually
1.
( informal ) to become gradually more powerful, active, etc. :
His election campaign is beginning to get up steam.
2.
( of a vehicle ) to increase speed gradually
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005