1. burst into laughter : 哈哈大笑起来；
2. roar with laughter : 哄笑；
名词
1. 笑声
Laughter is the sound of people laughing, for example because they are amused or happy.
2. 笑；快乐
Laughter is the fact of laughing, or the feeling of fun and amusement that you have when you are laughing.
1. the activity of laughing
the manifestation of joy or mirth or scorn
e.g. he enjoyed the laughter of the crowd
2. the sound of laughing
Synonym: laugh