Rocker (subculture) definition

(1) A curved support that permits the supported object to rock to and fro

(2) An ice skate with a curved blade

(3) A trough that can be rocked back and forth; used by gold miners to shake auriferous earth in water in order to separate the gold

(4) A chair mounted on rockers

(5) A teenager or young adult in the 1960s who wore leather jackets and rode motorcycles

(6) A performer or composer or fan of rock music

(7) An attendant who rocks a child in a cradle