From Longman Dictionary of Contemporary Englishrockerrock‧er /ˈrɒkə $ ˈrɑːkər/ noun [countable] 1 x-ref American English a rocking chair2 DHFone of the curved pieces of wood fixed to the bottom of a rocking chair, that allows it to move backwards and forwards if you push it3 → be off your rocker4 SSYa member of a group of young people in Britain in the 1960s who wore leather jackets, rode motorcycles, and listened to rock ‘n’ roll music → mod, greaser5 a musician who plays rock ‘n’ roll music, or someone who likes this kind of music ageing rockers
Examples from the Corpus
rocker• rocker Carl Perkins• Five chairs, one broken, one a rocker.• What is it about soundtrack projects that makes hard rockers want to change their tune?• Have you finally gone off your rocker? 