guerrilla /ɡəˈɹɪlə/noun 4adjective 3forms 3 noun4 •A soldier in a small independent group, fighting against the government or regular forces by surprise raids.The right-wing paramilitary's offensive against the Marxist guerrillas failed because they did not know the terrain well enough. •A marketer who uses guerrilla marketing techniques. •A maker of guerrilla television. •(no longer used) A non-official war carried out by small independent groups; a guerrilla war. adjective3 •Relating to, using, or typical of guerrilla warfare, or its principles of small independent or non-official perpetrators.On the other hand, after the fall of Feng Ling Tu, the operations of Central Shansi, and Suiyuan, troops were more guerrilla than orthodox in nature. — 1963 •Relating to, using, or typical of guerrilla marketing.We took a very guerrilla approach to marketing Goin' Hollywood, in keeping with the irreverent tone of the game. — 1989 •Using unconventional, non-traditional, non-mainstream and often subversive practices to achieve something.The Boston demonstration, which will feature singing and guerrilla theatre, will begin at 12 noon in front of the Park Street Subway station. — 1976 formsguerrillas · more guerrilla · most guerrilla