美 [mæs ˈmiːtɪŋ]
群众大会：一种大型的公共集会，通常用于讨论或宣传某个议题或政治目标。
a large gathering of people intended to arouse enthusiasm
同义词： rally
Another newspaper article: DELIRIUM TREMENS TWAIN—Mark Twain, who was to make a speech at the mass meeting of the Independents last night, didn't come to time!
报纸上又有一篇文章说：“患震颤性谵妄的吐温，昨晚本打算在独立派群众大会上发表讲话，却没来！”
The time appointed for the mass meeting was 9 a.m.
群众大会上午9点届时召开。
They held a mass meeting.
他们开了个群众大会。
Before the meeting Pope Benedict celebrated a large open-air mass in Valletta, attended by thousands of people.
VOA : standard.2010.04.18
The union is planning at a mass meeting at Hereford Town Hall on Thursday.
Another worker at the Southampton factory said a mass meeting had been planned for 1000 GMT.
Nonetheless, the mass meeting represented the first real move by Iraqis themselves to re-establish a civil administration.