1. (adj)upright, unsloped in a vertical position; not sloping
"an upright post"
2. (adj)good, just, upright of moralexcellence "a genuinely good person"; "a just cause"; "an upright and respectable man"
3. (adj)erect, vertical, upright upright in position or posture "an erect stature"; "erect flower stalks"; "for a dog, an erect tail indicates aggression"; "a column still vertical amid the ruins"; "he sat bolt upright"