Learn how to pronounce Unconstitutional in English --- UNCONSTITUTIONAL Pronunciation of Unconstitutional: /,ənkɑːnstɪ'tuːʃənəl/ - Definition of Unconstitutional: (1) (a.) Not constitutional; not according to, or consistent with, the terms of a constitution of government; contrary to the constitution; as, an unconstitutional law, or act of an officer. ★ http://Learn2Pronounce.com ★