Nearly 25,000 terms with dictionary-scale definitions. More than 8,000 highly detailed, full-colour illustrations, organised by subject in specialised fields from all aspects of life. Many have been redrawn to modernise the design, such as TV and medical equipment, while other brand-new technology, such as touch screen smartphones, have been added. Includes more than 2,000 new illustrations. Nearly 25,000 up-to-date technical and everyday terms with clear, concise definitions edited by Merriam-Webster lexicographers. Eighteen chapters and corresponding themes include a wide variety of fields: astronomy, the earth, human beings, the animal kingdom, plants and gardening, house and DIY, food, arts and architecture, clothing, science and energy, sports and games, and much more.