"a rocking chair," 1852, American English, from rock (v.1); earlier "nurse charged with rocking a cradle" (early 14c.). In sense of "one of the curved pieces of wood that makes a chair or cradle rock" it dates from 1787. Slang off (one's) rocker "crazy" first recorded 1897. Meaning "one who enjoys rock music" (as opposed to mod (n.1)) is recorded from 1963, from rock (v.2).
权威例句
1. Claire spent the morning in a wicker rocker on the screened porch with a book.
克莱尔整个早上都在装着纱窗的走廊里坐在柳条摇椅上看书。
2. Then she went back to the rocker to think.
然后她走到摇椅边,坐下来思索.
3. His landlady appeared to be slightly off her rocker.
看来他的女房东有点疯疯癫癫.
4. Harry Truman loved to sit in an old rocker in the evenings.