1) someone who expresses dissent about a war, or the way the war is being fought, or the false pretenses used to justify the war, or anything about that war they dont like or are against.
in the case of Iraq, this would include people all over the world who did not like Saddam Hussein, but disagree with the principle of preemptive war. establishing the principle of preemptive war abandons international law- meaning any country can invade and attack any other country they claim is a 'gathering threat' -not even an 'imminent threat' according to their intelligence agencies.
preemptive war is the same logic that terrorists the world over use to justify their actions.
Damn, that antiwar protester has some cajones to be out there in the street demonstrating when theres all those cops in riot gear with tear gas grenades, guns and batons.