Word.ws English Dictionary

know-it-alls

know-it-alls is the plural of know-it-all.

Meaning of know-it-all

Noun

know-it-all (plural know-it-alls)

  1. (US, derogatory) Someone who claims to be knowledgeable or an expert in something, obnoxiously dismissing the opinions, advice, suggestions, etc. of others.
    • We had it all figured out, but this know-it-all marched in with "the correct way of solving it", leaving our experiment in shambles.

Questions about know-it-alls

What is know-it-alls the plural of?
Know-it-alls is the plural of know-it-all.

Words near know-it-alls in the dictionary

  1. know-everythings
  2. know-how
  3. know-it-all
  4. know-it-allery
  5. know-it-allism
  6. know-it-alls
  7. know-nothing
  8. Know-Nothingism
  9. know-nothingness
  10. know-nothings
  11. knowabilities

Source and license

Adapted from Wiktionary: know-it-alls (page history and authors); know-it-all (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: “know-it-alls.” Word.ws, https://word.ws/know-it-alls. Based on Wiktionary, CC BY-SA 4.0.