1. To assume something is the way it is based on what is possible or apparent; however, without any proof or specific knowledge: He was supposing that he didn't pick up the book from the library after all because he was distracted by going to the bank.
2. To introduce an idea or a concept: Doug asked his wife, "Suppose we ask our banker how we should invest our money?"
3. To believe that something is true: June told her husband that she thought the plumber would charge more than they had supposed.

1. A term used to describe a particular situation that is probably not realistic despite the fact that many people believe that it is true or real: The supposed experts claim that there is a simple cure for insomnia.
2. That which is generally considered or believed to be correct, but which is not necessarily accurate: College and university students have had a supposed confidence that it would be easy to find a good job just before or reasonably soon after graduating.