This Comprehensive English-Kirundi (CEK) Dictionary is a major edition of the long-waited dictionary in the history of lexicography. It is thoroughly updated to contain the most recent vocabulary that cannot be found in other dictionaries. It is designed to include almost every word searchable by different groups of people including scholars, students, teachers, tradespeople, travellers, and tourists. This English-Kirundi dictionary contains over 47000 entries on more than 900 pages which makes it the biggest bilingual dictionary of English and Kirundi in the history of Burundi. The words and their meaning have been chosen with the consultation of different professionals in both languages English and Kirundi. This dictionary is not only rich in vocabulary, but it also contains appendices that will play a significant role in increasing the knowledge of its users.