under the impression

Idioms  

1. Thinking, assuming, or believing something, as in I was under the impression that they were coming today. This idiom often suggests that the idea or belief one had is mistaken. [Mid-1800s]

---

Example Sentences

If you haven’t yet watched the limited series, you may be under the impression that this is a spoiler.

From Salon

Citing someone she said was close to the case, Kelly said that she had previously been under the impression that Epstein “was into the barely legal type.”

From Salon

Under the impression that he was responsible for Garfield’s election, he believed the new president owed him a job — ambassador to France would be nice — and when none was coming, turned sour.

From Los Angeles Times

His mother was under the impression that he would do the fellowship as a gap year, and then reapply to return to college.

From The Wall Street Journal

"We deeply regret the issue caused to our clients as they would have been under the impression that a licence had been applied for."

From BBC