be supposed to do sth › to be expected or intended to do something, especially when this does not happen: These drugs are supposed to reduce the pain. He was supposed to be here by nine. › If you are supposed to do something, the rules say that you should do it: You're supposed to pay by the end of the month. You're not supposed to (= you should not) smoke in here.
be supposed to be sth › to be considered by many people to be something: The scenery is supposed to be fantastic.
› [T] to think that something is likely to be true: [+ (that)] I suppose that you've already heard the news?
suppose/supposing (that) › used to introduce an idea for someone to consider: Suppose he phones tonight. What should I say?
I suppose › used to show that you are not certain or not completely happy about something: It was quite interesting, I suppose.
I suppose so › used to show agreement to something when you do not really want to: "Can I come with you?" "I suppose so."