dialogue talk conversation chatgossip这 四个词语的区别是什么 请说的

dialogue是对话,必须有两个人在互相说话,一般用在书里,口语不怎么用
(The dialogue between Harry and Ron is really funny)
talk可以使任何形式的说话,一个人对一群人的讲话也可以用talk
(The teacher's talk annoys me)
conversation是一个人以上的说话,一般是讨论一个主题
(They are having a conversation)
chat是聊天,不一定有个主题,就是随便说话
(She is chatting with her friend on qq)
gossip是绯闻,八卦等,是在人群中传播的
(She is gossiping about Brittany Spear's divorce)