Entertaiment means amusement, fun and recreation. It is a general activity and can be enjoyed by all age groups. Entertainment can be a form of self-medication (such as watching television) or it may be a way to avoid boredom or loneliness (playing games with friends). In children it is important for brain development. It helps children to prepare for adult activities such as work, child rearing and social interaction through playing with dolls, pets or group games.
Sometimes it is abbreviated to entmt on fliers, in industry news publications and short hand note taking. It is not used as a normal word.