The Kalenjin/Kaleenchin language is spoken by close to 6 million people in Kenya with substantial numbers also in Uganda and Tanzania. The Kalenjin linguistic family in Kenya includes the Marakwet, Nandi, Sabaot, Kibsikiis, Terik, Keyyo,Tuken, Seng'wer, Ogiek and Pokot. These groups are mutually intelligible despite their variants of the Kalenjin language. This dictionary, the product of 15 years research activity is the first Kalenjin/English dictionary. It includes 13703 entries and is the hope of the author that the dictionary get improved and expanded. As words die or fall out of use, new words are created and given new meaning. The first edition is a system of that process.