target language

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The language into which a text written in another language is to be translated.
2. n. A language that a nonnative speaker is in the process of learning.
3. n. Computer Science The computer language, often a machine language, into which a document written in another computer language is to be translated.

Wiktionary

1. n. linguistics, translation studies The language into which a translation is done.
2. n. computing The machine language into which source code is to be compiled

GNU Webster's 1913

1. n. the language into which a text is to be translated; -- correlative of source language.

WordNet 3.0

1. n. a computer language into which something written in another computer language is to be translated
2. n. the language into which a text written in another language is to be translated