- Jeffersonian⇄adj. 1. of or having to do with Thomas Jefferson (1743-1826), third President of the United States, and the first great leader of the Democratic (then called Republican) Party.
Ex. Jeffersonian democracy.
2. of or like the political principl - Jeffersonian⇄Jeffersonian, adjective, noun.
- Jeffersonian⇄noun a follower of Thomas Jefferson.