a heavy, slow-moving vehicle with a roller, used to flatten the surfaces of roads during construction

after each truckload of earth fell, a steamroller flattened it

defeat comprehensively or easily

England have steamrollered their opponents in each of their four victories so far

Bayern steamrollered Benfica 5–2

(of a government or other authority) forcibly pass (a measure) by restricting debate or otherwise overriding opposition

the government's trying to steamroller a law through