Defn: A key or other device for breaking an electrical circuit.
BREAKDOWN
Break"down`, n.
1. The act or result of breaking down, as of a carriage; downfall.
2. (a) A noisy, rapid, shuffling dance engaged in competitively by a number of persons or pairs in succession, as among the colored people of the Southern United States, and so called, perhaps, because the exercise is continued until most of those who take part in it break down. (b) Any rude, noisy dance performed by shuffling the feet, usually by one person at a time. [U.S.] Don't clear out when the quadrilles are over, for we are going to have a breakdown to wind up with. New Eng. Tales.
BREAKER
Break"er, n.
1. One who, or that which, breaks. I'll be no breaker of the law. Shak.
2. Specifically: A machine for breaking rocks, or for breaking coal at the mines; also, the building in which such a machine is placed.
3. (Naut.)
Defn: A small water cask. Totten.
4. A wave breaking into foam against the shore, or against a sand bank, or a rock or reef near the surface. The breakers were right beneath her bows. Longfellow.