rocker

Rocker is a term with several uses in English. It can describe a person who performs in rock music, such as a rock musician, singer, or guitarist, or more broadly a person who identifies with or enjoys the rock genre.

In furniture, a rocker is a rocking chair or similar item that rests on curved legs called rockers. The curved supports enable the seat to swing back and forth. Rockers are common in living rooms and nurseries and appear in many styles.

In engineering and devices, rocker appears in several terms. A rocker arm is part of a valve train in many internal combustion engines, converting cam motion into valve movement. A rocker switch is a type of electrical switch that rocks between two stable positions. The term can also refer to the curved support on other mechanical assemblies.

Historically, "Rockers" was a British youth subculture in the 1950s and 1960s, associated with motorcycle culture, leather jackets, and a distinctive style that contrasted with the Mods.

In general, rocker denotes motion, culture, or mechanism depending on context.