(shā′kər) noun
1. One who or that which shakes; a container for shaking something: a saltshaker, cocktail shaker, etc.
2. One who shivers or shakes; a totterer.

(shā′kər) noun
One of a sect practicing celibacy and communal living, introduced in America in 1774 under the leadership of Mother Ann Lee, at Lebanon, New York: so called from their characteristic bodily movements during religious meetings. Their official name is The United Society of Believers in Chris's Second Appearing.
—Shak′er·ism noun