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.

---

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)

---

Other Word Forms

• Jeffersonian
  adjective

Example Sentences

The season begins with a new production of Friedrich Dürrenmatt’s tragicomedy “The Visit,” directed by Tony Award winner Darko Tresnjak and starring Jefferson Mays.

From Los Angeles Times • May 7, 2026

Northern Territory Police Acting Commander Mark Grieve on Monday told media investigators want to speak with 47-year-old Jefferson Lewis, who was staying at the camp and vanished around the same time.

From BBC • Apr. 26, 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

As one of the site’s Nation Builders—first-person interpreters portraying figures of Revolutionary America—Smith regularly fields autograph requests and accepts gifts: a custom mug tiled with his own face, a vinyl album of original Jefferson ballads.

From The Wall Street Journal • Apr. 16, 2026

Thomas Jefferson also loved music, according to Isaac.

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