Definition of "quadrilingual" []

• Written in four languages. (adjective)
• Able to speak four languages. (adjective)

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• "Some examples follow below, from the quadrilingual Dutch work of the period, Moderne Kerken in Europe en America, which also includes some strange Central European and French monstrosities, not shown here -- though I admit a secret fondness for the etherial openness of Perret's Notre Dame du Raincy, just not all that exposed concrete."
• "Here in Bosnia and Herzegovina, the Organization for Security and Co-Operation in Europe (OSCE) Mission, established by the Dayton peace accords, is leading the way in providing electronic information to Bosnia diaspora, young people, nongovernmental organizations, journalists, academics and researchers around the world through its quadrilingual Web site."
• "I also know a yound Nepali boy who was trilingual in Nepali, Hindi and English before he went to school, and became effectively quadrilingual when he started attending a school with a large Punjabi roll."