One who opposes another; one who works or takes a position against someone or something; one who attempts to stop the progress of someone or something.
The participant who opens an academic debate by putting forward objections to a theological or philosophical thesis.
One who opposes another in words (in a dispute, argument or controversy).
One who is opposed or objects (to a policy, course of action or set of ideas).
One who opposes another physically (in a fight, sport, game, or competition).
Someone who unnecessarily defends someone else.
An individual or corporation that intends to acquire another company in order to avert a hostile takeover.
A man who defends a woman in debate etc. in an attempt to gain her favour.
A mushroom of species Tricholoma album.
A hero, savior, or righteous individual.
To unnecessarily defend someone, especially in an attempt to gain favour.