lingua franca /ˈlɪŋgwəˈfræŋkə/ noun plural lingua francas or linguae francae /ˈlɪŋgwiˈfræŋki/ plural lingua francas or linguae francae /ˈlɪŋgwiˈfræŋki/ Learner's definition of LINGUA FRANCA
[count]
: a language that is used among people who speak various different languages通用语