Entertaiment is amusement, usually involving a performance. A clown at a birthday party, a Broadway show, your friends fighting over the last potato chip–these are all forms of entertainment. The word comes from the Latin inter tenere, meaning “to hold inside.” It later came to refer specifically to hospitality: entertaining guests meant keeping them happy. Today we mostly use it to mean anything that amuses or distracts.
Singing is an honest and pleasurable form of entertainment, but it’s important to avoid lewd songs.