▪ a layer of material that forms, protects, or strengthens the back of something: "the fabric has a special backing for durability"Similarlininginterliningfacingunderlayreinforcement
▪ (especially in popular music) the music or singing that accompanies the main singer or soloist: "the trio provided backing to some of the most popular vocalists of the day"Similarmusical accompanimentorchestrationharmonyobbligato
2. the movement of the place of formation of a sound toward the back of the mouth.