/pij"euhn/ , n.
1. an auxiliary language that has come into existence through the attempts by the speakers of two different languages to communicate and that is primarily a simplified form of one of the languages, with a reduced vocabulary and grammatical structure and considerable variation in pronunciation.
2. (loosely) any simplified or broken form of a language, esp. when used for communication between speakers of different languages.
[ 1875-80; extracted from PIDGIN ENGLISH ]