Jefferson

American  

[jef-er-suhn] / ˈdʒɛf ər sən /

noun

1. Joseph, 1829–1905, U.S. actor.

2. Thomas, 1743–1826, U.S. statesman, diplomat, architect, and author: 3rd president of the U.S. 1801–09.

3. a river in southwestern Montana, flowing generally northeast to join the Madison and Gallatin rivers to form the Missouri River. 225 miles (362 km) long.

4. Mount Jefferson, a mountain in northwestern Oregon, in the Cascade Range. 10,497 feet (3,199 meters).

5. Mount Jefferson, a mountain in northern New Hampshire, in the Presidential Range of the White Mountains. 5,715 feet (1,742 meters).

6. a male given name.

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Jefferson British  

/ ˌdʒɛfəˈsəʊnɪən, ˈdʒɛfəsən /

noun

1. Thomas. 1743–1826, US statesman: secretary of state (1790–93); third president (1801–09). He was the chief drafter of the Declaration of Independence (1776), the chief opponent of the centralizing policies of the Federalists under Hamilton, and effected the Louisiana Purchase (1803)

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Other Word Forms

• Jeffersonian
  adjective

Example Sentences

Authorities recovered large amounts of fireworks from the Jefferson Park property and discovered a man dead, Los Angeles Police Department spokesman Dennis Orris said.

From Los Angeles Times • May 9, 2026

Thomas Jefferson once wrote that he had “sworn upon the altar of God eternal hostility against every form of tyranny over the mind of mind.”

From Salon • Apr. 24, 2026

Japan's Daichi Kamada, 29, and Colombia's Jefferson Lerma, 31, have played regularly in midfield this season but both face becoming unattached midway through the World Cup, although the Eagles have a one-year option on Lerma.

From BBC • Apr. 21, 2026

The devotion is well-earned: Smith can quote Jefferson verbatim and cites Seneca and Enlightenment philosophers without blinking.

From The Wall Street Journal • Apr. 16, 2026

Jefferson wrote about the ideals and principles of equality and even proposed some small steps toward ending American slavery.

From "In the Shadow of Liberty" by Kenneth C. Davis