firebomb Syllabification: (fire·bomb)Pronunciation: /ˈfīrˌbäm/Translate firebomb | into French | into German | into Italian Definition of firebomb noun a bomb designed to cause a fire. verb [with object] attack or destroy (something) with a bomb which causes a fire:he suspects that someone firebombed his businessfirebomb in other Oxford dictionaries Definition of firebomb in the British & World English dictionary