ROCK

(MOVE) [verb] - to (cause someone or something to) move backwards and forwards or from side to side in a regular wayHe picked up the baby and gently rocked her to sleep. [T]If you rock back on that chair, you're going to break it. [I]If a building is rocked by an explosion, the force of the explosion makes the building shake.The explosion, which rocked the city, killed a number of passers-by and damaged many buildings.If an event rocks a group of people or society, it causes feelings of shock and fear.The managing director's resignation rocked the whole company.The program has been rocked by allegations of fraud and mismanagement.(informal) If you rock the boat, you do or say something that will upset people or cause problems.A small number of MPs are determined to speak out against the bill, even if this means rocking the boat.A rocking chair (also rocker) is a chair built on two pieces of curved wood so that you can move forwards and backwards on it as you sit in it.See pictures: Chairs, Living roomA rocking horse is a wooden toy horse that children can make move backwards and forwards as they sit on it.See picture: Toys