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).
How to use bolt upright in a sentence
I disapprove of what you say, but I will defend to the death your right to say it.
“I think for trans men who are dating every time they hook up they have another coming out,” Sandler said.
Everywhere I go, ‘Hey Cartman, you must like Family Guy, right?’
In that photo, Merabet has a big smile that spreads across his whole face and lights up his eyes.
Charlie ridiculed my faith and culture and I died defending his right to do so.
What need to look to right or left when you are swallowing up free mile after mile of dizzying road?The Joyous Adventures of Aristide Pujol|William J. Locke
Mrs. Wurzel was quite right; they had been supplied, regardless of cost, from Messrs. Rochet and Stole's well-known establishment.The Pit Town Coronet, Volume I (of 3)|Charles James Wills
Most of the men leaped up, caught hold of spears or knives, and rushed out.The Giant of the North|R.M. Ballantyne
Some weeks after, the creditor chanced to be in Boston, and in walking up Tremont street, encountered his enterprising friend.
In less than ten minutes, the bivouac was broken up, and our little army on the march.