The present publications is an up-to-date, authentic and comprehensive dictionary of engineering, which recognizes that engineering is a field in its own right, with its own language, and that terms and their definitions are important for professionals and students of engineering. It aims to provide clear, concise, and correct definitions and descriptions of the terms used in engineering. The terminology of all the branches of engineering are included in this work. This work is designed to be a comprehensive reference tool for engineering professionals, students and laymen interested in engineering. It is earnestly hoped that it will be an authoritative source to which one can turn with confidence for meaning and knowledge of the common, specialized and latest terms in engineering and allied fields.