standing or sitting straight up
Katie was still awake, sitting bolt upright (=sitting with her back very straight) staring at the television.
pull/push/draw etc yourself upright
He pulled himself upright and faced me.
placed in a vertical position (=pointing in a line that is at an angle of 90° to a flat surface):
Your seat should be in the upright position when the plane is landing.
Keep the bottle upright.
always behaving in an honest way:
He was a good honest upright man.
—uprightness noun [uncountable]WORD FOCUS: good
very good: excellent, fantastic, wonderful, great, terrific, neat American English, superb, amazing, outstanding, brilliant, impressive, fine, first-class, out of this world
of good quality: high quality, top quality, superior, deluxe, classy
morally good: decent, virtuous, respectable, honourable British English/honorable American English, upright, beyond reproach
➔ See also good