Something affording pleasure, diversion, or amusement: the entertainment of guests at a ball.
The word entertains has its roots in the Medieval Latin inter tenere, wherein tenere means to hold inside. It is also a form of entrainment, as in “entertainment news.”
Entertainment can be on a very small scale, from a personal choice of pre-recorded music and movies for one person, to the play of children, which teaches them social interaction, prepares them for adult responsibilities like child rearing or work (through dolls, pets or group games), or develops motor skills needed for sports and music. Entertainment can also hit on themes that the human mind was shaped to deeply respond to such as backstabbing and murder.