OK的意思就是：同意，可以，是的，好的，等表示赞同的意思。
OK的反义词应该是：No，Ok的同义词应该是：yes。OK的用法OK常用于口语或非正式书面语，OK不但写法和读法变化多端，而且其语法功能和语用功能也是多种多样的。例如：
1、用作形容词I hope the children are OK. (表语)He made an OK decision. (定语)2用作副词That car goes OK now.Let's go there, OK? (征求意见)“Shall we go there?” “OK.” (表示同意)“Can I use your car?” “OK.”(给以许可)3用作名词I heard his faint OK.We've got the OK from the council at last.4用作动词They will OK the proposal.The editor will OK the manu for publication.5用作感叹词OK, you can go.OK, they know this usage.
