1a person who performs, dances to, or enjoys rock music:a punk rocker
a rock song:the collection kick-starts with a great rocker, Wired All Night
British a young person, especially in the 1960s, belonging to a subculture characterized by leather clothing, riding motorcycles, and a liking for rock music.
2a rocking device forming part of a mechanism, especially one for controlling the positions of brushes in a dynamo.
3a curved bar or similar support on which something such as a chair or cradle can rock.
a rocking chair:he sat in his rocker and went to sleep
4 [mass noun] the amount of curvature in the longitudinal contour of a boat or surfboard:the hull lines are classic with considerable rocker
Phrases
off one's rocker
informal mad:he looked so strange she thought he was off his rocker
