cognizant

Etymology

It is formed from English cognizance + -ant,^[2][3][4][5] on the model of such pairs as abundance and abundant.^[6][7] Etymonline calls it a back-formation instead.^[8] The OED notes that the adjective is missing from 18th-century dictionaries, Todd's Johnson of 1818 and Webster's of 1828, and was probably formed afresh from cognizance and cognize, although it matches Old French conisant, conusant in form;^[5] the Oxford Dictionary of English likewise thinks it probably came directly from cognizance.^[9] The noun cognizance is Middle English conissaunce, from Old French conoissance (“acquaintance, recognition; knowledge”),^[3][8][5] from conoistre (“to know”), from Latin cognōscō (“to get to know, recognize”),^[8][3][2] formed from com- (“together”) and gnōscō (“to know”), from Proto-Indo-European *gno- (“to know”).^[8] The g was put back into the English spelling of the noun in the 15th century and has gradually changed its pronunciation.^[8][5]

Earliest recorded meaning

Having knowledge, aware: 1820, in an ode by Southey.^[5][6] Dictionary.com dates the word to 1810–20,^[4] but Etymonline dates it to 1744, with a legal sense "competent to take judicial notice".^[8]

Semantic evolution

The adjective took over the senses of cognizance: its usual sense, "aware (of)", follows the noun's sense of knowledge, and its legal sense, "having jurisdiction", the noun's sense of the right to try a case.^[5] Hallam used it in philosophy for "that knows or cognizes" in 1839,^[5] and the legal sense is first recorded in Craig's dictionary of 1847.^[5][2] Before this, the OED records cognizant as a noun, meaning a badge or device and later knowledge, from about 1394 to 1634, apparently Old French conoisant used as a noun.^[5] Merriam-Webster Unabridged gives "mindful" as a further shade of the adjective.^[6]

Timeline

• 1820 – having knowledge, aware (of).^[5][6]
• 1839 – (philosophy) that knows or cognizes.^[5]
• 1847 – (law) having jurisdiction over a case.^[5][2]

Meanings

Adjective

1. Having knowledge of something; aware or fully informed, usually followed by of: The board was cognizant of the risks.^{[10][6][11][5]}
2. Keeping something in mind; mindful: Travellers should stay cognizant of local customs.^[6]
3. (philosophy) Capable of knowing; having cognition.^[5][2]
4. (law) Having jurisdiction, competent to deal with a case.^[5][2]

Word family

• incognizant
• noncognizant
• precognizant
• uncognizant

Related words

• cognizance
• cognize
• cognition
• recognize
• incognito
• know

Usage notes

Collins and Chambers give the pronunciation without the g beside the usual one.^[10][12] The noun cognizance was long pronounced "con-", and the OED notes that the older pronunciation is still usual in legal use.^[8][5] The spelling cognisant is chiefly British.^[6][10]

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
3. ^ a b c The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
4. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
5. ^ a b c d e f g h i j k l m n o p Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
6. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
7. ^ Gove, Philip Babcock, ed. (1961), Webster's Third New International Dictionary of the English Language, Unabridged, Springfield, Mass.: G. & C. Merriam
8. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
9. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
10. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
11. ^ The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
12. ^ The Chambers Dictionary (2014), 13th ed., Edinburgh: Chambers