From Longman Dictionary of Contemporary Englishrocking chairˈrocking chair noun [countable] 
DHFa chair that has two curved pieces of wood fixed under its legs, so that it moves backwards and forwards smoothly
DHFa chair that has two curved pieces of wood fixed under its legs, so that it moves backwards and forwards smoothlyExamples from the Corpus
rocking chair• She had stolen a braided rug from the foot of his own bed and a rocking chair from the garage.• In the living room, I sit, feet up, huddled in a rocking chair.• They sat in armchairs in a low-beamed room at the front while Archer perched in a rocking chair.• He sat in a rocking chair that faced the door.• There was a miniature rocking chair, and against the end wall a single bed with a miniature canopy over it.• Matt cradles Alexandra in the rocking chair since she is having no part of her planned bedtime. 