Definition of rocker
1 a
:either of two curving pieces of wood or metal on which an object (such as a cradle) rocks
c
:any of various objects in the form of a rocker or with parts resembling a rocker (such as a skate with a curved blade)
d (1)
:any of the curved stripes at the lower part of a chevron worn by a noncommissioned officer above the rank of sergeant
(2)
:the curved stripe at the upper part of a chevron worn by a chief petty officer
2
:any of various devices that work with a rocking motion
3
:a rock performer, song, or enthusiast
—
off one's rocker
:in a state marked by extreme confusion or mental unsoundness
- … he felt dizzy, slightly off his rocker at this extraordinary assailment of his senses.
- —Bernard Malamud
