Impression
Impression noun - Something imagined or pictured in the mind.
Usage example: had a vague impression that the guide would be female
Theory is a synonym for impression in feeling topic. In some cases you can use "Theory" instead a noun "Impression".
Theory
Theory noun - An idea that is the starting point for making a case or conducting an investigation.
Usage example: set out to prove her theory that people can't really taste any difference between colas, so they buy according to the product's image
Impression is a synonym for theory in hypothesis topic. Sometimes you can use "Impression" instead a noun "Theory".
Mutual synonyms
Related pairs
How words are described
Both words in one sentence
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In very old stories, the theory of "maternal impression" may be used to explained it — either seriously, or as a way of bamboozling the putative father.
Source: Chocolate Baby - Some were under the impression that Rey might be Kylo's sister or cousin due to the popular theory that she was in some way related to the Skywalker family (either through Han/Leia or Luke); however, the theory was eventually disproven by Word of God◊.
Source: Abandon Shipping - It's well done and a good theory, giving a good impression of Rome and his life in a neat little package.
Cite this Source
Theory and Impression. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impression/theory
Impression & Theory. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impression/theory>.
Theory or Impression. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impression/theory.
Google Ngram Viewer shows how "impression" and "theory" have occurred on timeline