n. One who pushes a principle or measure to extremes; an extremist; a radical; an ultra
the GNU version of the Collaborative International Dictionary of English
n. One who pushes a principle or measure to extremes; an extremist; a radical; an ultra.
The Century Dictionary and Cyclopedia
n. An ultra; an extremist.
Word Usage
"And when flouted and reproached by smooth and lofty ecclesiastics, as an ultraist and leveler, he explained and justified himself by observing, that he had only done what his office demanded."