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English definition of “guerrilla”

guerrilla

noun [C] uk (also guerilla)   /ɡəˈrɪl.ə/ us  
a member of an unofficial military group that is trying to change the government by making sudden, unexpected attacks on the official army forces: A small band of guerrillas has blown up a train in the mountains. guerrilla warfare

guerrilla

adjective uk   /ɡəˈrɪl.ə/ us  
using unusual methods to get attention for your ideas, products, etc.: guerrilla marketing
(Definition of guerrilla from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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