Thomas Jefferson owned a number of English language dictionaries, including:
- Johnson, Samuel. A Dictionary of the English Language, 4th ed. Dublin: Printed for Thomas Ewing, 1775.
- Walker, John. A Critical Pronouncing Dictionary and Expositor of the English Language. Philadelphia: Budd & Bartram, 1803.
- Webster, Noah. A Compendious Dictionary of the English Language. Hartford and New Haven: From Sidney's Press for Hudson & Goodwin, Booksellers, and Increase Cooke & Co., Booksellers, 1806.
Further Sources