imagine (imagines 3rd person present) (imagining present participle) (imagined past tense & past participle )
1 verb If you imagine something, you think about it and your mind forms a picture or idea of it.
He could not imagine a more peaceful scene... V n/-ing
2 verb If you imagine that something is the case, you think that it is the case.
(=suppose)
I imagine you're referring to Jean-Paul Sartre... V that
3 verb If you imagine something, you think that you have seen, heard, or experienced that thing, although actually you have not.
(=dream)
I realised that I must have imagined the whole thing. V n, Also V that