old definition: 1. having lived or existed for many years: 2. unsuitable because intended for older people: 3. used to describe or ask about someone's age. Learn more. Examination of Old English words and modern meanings is very educational and can give you a glimpse of how languages develop through time. Old English (Ænglisc, Anglisc, Englisc), or Anglo-Saxon, is the earliest historical form of the English language, spoken in England and southern and eastern Scotland in the early Middle Ages. It was brought to Great Britain by Anglo-Saxon settlers probably in the mid-5th century, and the first Old English literary works date.