1 to form or have a mental picture or idea of something:
Imagine Robert Redford when he was young - that's what John looks like.
[+ (that)] Imagine (that) you're eating ice cream - try to feel how cold it is.
[+ question word] Can you imagine how it feels to be blind?
[+ -ing verb] She imagined herself sitting in her favourite chair back home.
They hadn't imagined (= expected) (that) it would be so difficult.
I can't imagine (= I really don't know) what he wants from us.