adj. & n.
adj. 1 erect, vertical (an upright posture; stood upright). 2 (of a piano) with vertical strings. 3 (of a person or behaviour) righteous; strictly honourable or honest. 4 (of a picture, book, etc.) greater in height than breadth.
n. 1 a post or rod fixed upright esp. as a structural support. 2 an upright piano. uprightly adv. uprightness n.
[ OE upriht (as UP, RIGHT) ]