Word.ws English Dictionary

known inside and out

known inside and out is the past participle of know inside and out.

Meaning of know inside and out

Verb

know inside and out (third-person singular simple present knows inside and out, present participle knowing inside and out, simple past knew inside and out, past participle known inside and out)

  1. (idiomatic, transitive) To know (something or someone) very thoroughly.
    • He's still new to their system, but he knows databases inside and out and will understand the rest soon.

Questions about known inside and out

What is known inside and out the past participle of?
Known inside and out is the past participle of know inside and out.

Words near known inside and out in the dictionary

  1. known full well
  2. known how many beans make five
  3. known how to pick 'em
  4. known how to walk before one could run
  5. known if one was Arthur or Martha
  6. known inside and out
  7. known known
  8. known knowns
  9. known like the back of one's hand
  10. known no bounds
  11. known of

Source and license

Adapted from Wiktionary: known inside and out (page history and authors); know inside and out (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “known inside and out.” Word.ws, https://word.ws/known_inside_and_out. Based on Wiktionary, CC BY-SA 4.0.