ˌsemi-autoˈmatic BrE AmE ( also sem‧i‧au‧to‧mat‧ic American English ) /ˌsemiɔːtəˈmætɪk◂ $ -ɒːtə-/ adjective
a semi-automatic weapon moves each bullet into position ready for you to fire, so that you can fire the next shot very quickly
—semi-automatic noun [countable]