be under the impression that
To be living, operating, or functioning with the belief that something is true. Jeremy's always been under the impression that he's a great writer, even though he's never written more than a few crummy poems. Oh, I was under the impression that we were meeting at two—did that change? Oh, sorry, I was under the impression that you two were a couple. My mistake.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.