\Jef`fer*so"ni*an\, a.
Pertaining to, or characteristic of, Thomas Jefferson or his
policy or political doctrines. --Lowell.

\Jef`fer*so"ni*an\, a.
Pert. 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.