Posted in Business & Finance, Government & Military, Organizations, Religion, Schools & Education DIEC stands for Dubai International Exhibition Centre DIEC stands for Dhahran International Exhibitions Company (Saudi Arabia) DIEC stands for Diccionari de l’Institut d’Estudis Catalans (dictionary for Catalan language) DIEC stands for Direction Interdiocésaine de l’Enseignement Catholique (French: Interdiocesan Directorate of Catholic Education)