Longman Dictionary of Contemporary English - upright

~1 adj 1 standing straight up 2 always behaving in an honest way  (decent, upright citizens) - uprightness n ~2 adv 1 sitting or standing with your back straight  (sit/stand bolt upright)  (He sat bolt upright, startled by the scream.) 2 if something is pulled, held etc upright, it is put into a position in which it is standing straight up ~3 n a long piece of wood or metal that stands straight up and supports something