Precisely perpendicular, erect in carriage, as in She sat bolt upright in her pew. This expression was used in slightly different form by Chaucer in the late 1300s: “She was ... long as a mast and upright as a bolt” (The Miller's Tale).
Words nearby bolt upright
How to use bolt upright in a sentence
As I tried to get upright, I realized with horror that the blood was my own.I Was Gang Raped at a UVA Frat 30 Years Ago, and No One Did Anything|Liz Seccuro|December 16, 2014|DAILY BEAST
He slept in an upright position in a custom armchair, so the reasons for his lying down to sleep are open to speculation.
Like any high-powered attorney who charges $100,000 for a retainer, Bolt always seems to be one step ahead of the competition.Gone Girl’s Biggest Twist Is the Superb Tyler Perry|Alex Suskind|October 6, 2014|DAILY BEAST
They look like evil corn silos or upright storm sewers or a trio of escaped steroidal church organ pipes wearing party hats.
So why not keep all passengers in the ‘upright position’ when they fly?
In shape it is curved, like those things for candles attached to upright pianos, but with a weighted foot to hold it firm.Music-Study in Germany|Amy Fay
Mrs. Ducksmith, who had sat with overwhelmed head in her hands, started bolt upright, and looked at him like one thunderstruck.The Joyous Adventures of Aristide Pujol|William J. Locke
He had a flashlight gun in his right hand, and a photographer's tripod was propped upright between his knees.
The sick woman had raised herself upright, and was stretching her arms towards them.Oliver Twist, Vol. II (of 3)|Charles Dickens
"Take some melon, Mr. Mudge," said we, as with a sudden bolt we recovered our speech and took another slice ourself.