Anglo-Norman refers to the variety of the Norman French language that developed in England after the Norman Conquest of 1066. It was spoken by the ruling class and became the language of the court, law, and literature, influencing the development of the English language. Over time, Anglo-Norman evolved and incorporated elements from Old English, leading to a unique linguistic blend. It played a significant role in shaping Middle English and contributed to the rich tapestry of English vocabulary, especially in areas like law, art, and governance.