Noun
the language into which a text written in another language is to be translated
a computer language into which something written in another computer language is to be translated
Source: WordNetSets his theory of truth (against Alfred Tarski), where an object language can contain its own truth predicate. Source: Internet
The sentence referred to is part of the "object language", while the referring sentence is considered to be a part of a "meta-language" with respect to the object language. Source: Internet
The latter he called an object language, the language being talked about. Source: Internet