NOUN (1)

1. a follower of Thomas Jefferson or his ideas and principles;


ADJECTIVE (1)

1. relating to or characteristic of Thomas Jefferson or his principles or theories;
- Example: "Jeffersonian democracy"

The Collaborative International Dictionary of English v.0.48:

Jeffersonian \Jef`fer*so"ni*an\, a.
   Pertaining to, or characteristic of, Thomas Jefferson (third
   President of the United States) or his political doctrines,
   which were those of the Republicanism of his time, as opposed
   to those of the Federalists. -- n. An adherent of Jefferson
   or his doctrines. -- Jef`fer*so"ni*an*ism, n.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Jeffersonian
    adj 1: relating to or characteristic of Thomas Jefferson or his
           principles or theories; "Jeffersonian democracy"
    n 1: a follower of Thomas Jefferson or his ideas and principles