At right angles to the horizon or to level ground
Directed or pointed upward
Having or marked by uprightness in principle and action
A moment later he sat upright in bed.
She scrambled to sit upright, forcing the pain in her shoulder to the back of her mind.
It was all she could do to remain upright on tingling weak legs.
He steadied himself, pulling upright until he was sure of his footing.
The upright stone objects.