Oxford Dictionary English special effects nounnoun BrE BrE//ˌspeʃl ɪˈfekts// ; NAmE NAmE//ˌspeʃl ɪˈfekts// (also SFX) [plural] Add to my wordlistjump to other resultsunusual or exciting pieces of action in films/movies or television programmes, that are created by computers or clever photography to show things that do not normally exist or happenSee special effects in the Oxford Advanced American DictionaryCheck pronunciation: special effects oxfordlearnersdictionaries.com