ˌsecond ˈlanguage BrE AmE noun [countable usually singular]
a language that you speak in addition to the language you learned as a child ⇨ mother tongue
ˌsecond ˈlanguage BrE AmE noun [countable usually singular]
a language that you speak in addition to the language you learned as a child ⇨ mother tongue
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012