By Under the Impression That?

If you are under the impression that something is the case, you believe that it is the case, usually when it is not actually the case. He had apparently been under the impression that a military coup was in progress.

What does it mean to be under the impression?

Definition of be under the impression

: to have an idea or belief that is usually not clear or certain I was under the impression that admission was free.

What is a synonym for under the impression?

assuming, holding a view, maintaining, presuming, under the impression, putting faith in.