TUKI English – Swahili Dictionary is the most up to date dictionary of current English. It is published after more than a century since Madan published the first English – Swahili Dictionary in 1894, and half a century since Johnson (1939) was published. Johnson (1939) English – Swahili Dictionary, hitherto the most elaborate and authoritative dictionary, was compiled with the objective of helping the user to comprehend English texts. With the changing needs of a dictionary user, a new dictionary was necessary for two reasons : (1) to record new words and new meanings of words which the language acquired during the last 55 years, and (2) to provide some lexicographical information that current dictionary users need