Definition of coo

The word "coo" has a fascinating origin. It is believed to have come from the Middle English word "cou", which was an imitative sound used to express a gentle, soothing cooing noise, often associated with birds, such as pigeons and doves. This sound was likely meant to evoke the soft, murmuring sound of these birds. The word "coo" has evolved over time to encompass a range of meanings, including a gentle, soothing sound, a loving or affectionate expression, and even a feeling of admiration or approval. In modern English, you might use "coo" to express delight or excitement, such as "Coo, what a beautiful sunset!" or "Coo, that's a great idea!" Despite its changes in meaning, the word "coo" remains rooted in its early imitative origins, evoking a sense of gentle, soothing sound that has captivated humans for centuries.