sweeper
noun [ C ] uk/ˈswiː.pər/ us/ˈswiː.pɚ/
(CLEANING)
清扫工;扫除机，清扫机
someone or something that sweeps something clean
a carpet sweeper (= a machine for cleaning carpets) 地毯清扫机
a road sweeper (= a person whose job is cleaning the roads) 清道夫，马路清洁工
(FOOTBALL)
（足球）清道夫，拖后中卫
In football, a sweeper is a player whose position is behind the other defenders (= players whose main aim is to stop points from being scored) .