antiballistic missile(n = noun.artifact) abm - a defensive missile designed to shoot down incoming intercontinental ballistic missiles; "the Strategic Arms Limitation Talks placed limits on the deployment of ABMs"
is a kind of guided missile

air-to-air missile, air-to-ground missile, air-to-surface missile, ballistic missile, ballistic missile defense organization, basic point defense missile system, cruise missile, fleet ballistic missile submarine, guided missile, guided missile cruiser, guided missile destroyer, guided missile frigate, heat-seeking missile, intercontinental ballistic missile, missile, missile defence system, missile defense system, naval missile, surface-to-air missile, surface-to-air missile system