a piece of paper that gives you information or advertises something

Demonstrators handed out leaflets to passers-by. 示威者向路人发放传单。

A leaflet about the new bus services came through the door today. 今天从门缝塞进来一张介绍公交车新增服务的广告。

to give out leaflets to people

They leafleted the area two weeks before the event. 活动开始前两周他们就在该地区散发了广告。