rock ‧ er /ˈrɒkə $ ˈrɑːkər/ BrE AmE noun [countable]
1 . American English a ↑ rocking chair
2 . one 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 it
3 . be off your rocker spoken informal to be crazy
4 . a member of a group of young people in Britain in the 1960s who wore leather jackets, rode ↑ motorcycle s , and listened to ROCK ‘N’ ROLL music ⇨ mod , greaser
5 . a musician who plays ROCK ‘N’ ROLL music, or someone who likes this kind of music:
ageing rockers