'Resister' definitions:

Definition of 'resister'

From: WordNet
noun
Someone who systematically obstructs some action that others want to take [syn: obstructionist, obstructor, obstructer, resister, thwarter]
noun
Someone who offers opposition [syn: adversary, antagonist, opponent, opposer, resister] [ant: agonist]

Definition of 'Resister'

From: GCIDE
  • Resister \Re*sist"er\ (-?r), n. One who resists. [1913 Webster]