Entertaiment is a broad genre and the definition is open to interpretation. It includes activities that are entertaining and uplifting to the spirit, mind and body. It also hits on themes that the human brain was evolutionarily shaped to react deeply to, such as backstabbing, murders and other aspects of the social world. It often stimulates the brain to realease seratonin and dopamine, and can be considered a type of drug.
The word entertainment derives from the Medieval Latin intertenere and the Indo-European root ten. It is derived from the prefix inter, meaning inside, and the suffix ten, meaning hold. It refers to holding something inside for the enjoyment of others. The word was first recorded in 1570.