To think that something is true without being sure. Also, a person who does this.
Supposer can make people think of guessing or imagining things.
Examples:
I suppose it will rain tomorrow.
She is a supposer and always thinks the best of people.
He supposes that the cake is delicious.
I suppose you're right, but I'm not sure.
I suppose I have a million dollars in my pocket!
The supposer thought the treasure was buried in the garden.