Bolt

bōlt, n. a bar or pin used to fasten a door, .: an arrow: a thunderbolt, as in 'a bolt from the blue.'— v.t. to fasten with a bolt: to throw or utter precipitately: to expel suddenly: to swallow hastily.— v.i. to rush away (like a bolt from a bow): to start up: ( U.S. ) to break away from one's political party.— ns. Bolt′-head , the head of a bolt: a chemical flask; Bolt′-rope , a rope sewed all round the edge of a sail to prevent it from tearing; Bolt′sprit (same as Bowsprit ).— adv. Bolt′-up′right , upright and straight as a bolt or arrow.— n. Bolt′-up′rightne . [A.S. bolt ; Old High Ger. bolz .]