1. A belief or opinion: had an old-fashioned notion of what qualities were most important in a mate.
2. A mental image; an idea or conception: Do you have any notion of what I'm referring to? See Synonyms at idea.
3. An impulse or whim: I suddenly had the notion of walking by the river.
4. notions Small lightweight items for household use, such as needles, buttons, and thread.
[Middle English nocioun, concept, from Latin nōtiō, nōtiōn-, from nōtus, known, past participle of nōscere, to get to know; see gnō- in the Appendix of Indo-European roots.]
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The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.