1. aggressor(n = noun.person) assailant, assaulter, attacker - someone who attacks;
is a kind of offender, wrongdoer
has particulars: ambusher, avenger, retaliator, beast, brute, savage, wildcat, wolf, bludgeoner, bully, hooligan, roughneck, rowdy, ruffian, tough, yob, yobbo, yobo, harasser, harrier, iconoclast, marauder, piranha, predator, vulture, night rider, nightrider, raper, rapist, shedder, spiller, slasher, stabber, lapidator, stoner
Derived form verb aggress1
2. aggressor(n = noun.person) - a confident assertive person who acts as instigator;
is a kind of initiator, instigator
The person who first attacks or makes an aggression; he who begins hostility or a quarrel; an assailant. [1913 Webster]
"The insolence of the aggressor is usually proportioned to the tameness of the sufferer." [1913 Webster]
aggressor, n. a person who attacks without provocation.
Etymology:
L (as AGGRESSION)
N attack, assault, assault and battery, onset, onslaught, charge, aggression, offense, incursion, inroad, invasion, irruption, outbreak, estrapade, ruade, coupe de main, sally, sortie, camisade, raid, foray, run at, run against, dead set at, storm, storming, boarding, escalade, siege, investment, obsession, bombardment, cannonade, fire, volley, platoon fire, file fire, fusillade, sharpshooting, broadside, raking fire, cross fire, volley of grapeshot, whiff of the grape, feu d'enfer, cut, thrust, lunge, pass, passado, carte and tierce, home thrust, coupe de bec, kick, punch, battue, razzia, Jacquerie, dragonnade, devastation, eboulement, assailant, aggressor, invader, base of operations, point of attack, echelon, attacking, aggressive, offensive, obsidional, up in arms, on the offensive, Int, up and at them!, the din of arms, the yell of savage rage, the shriek of agony, the groan of death, their fatal hands no second stroke intend, thirst for glory quells the love of life.