• at right angles to a horizontal plane; in a direction, or having an alignment, such that the top is directly above the bottom

Synonyms: upright, erect, perpendicular, plumb, straight (up and down), on end, standing, upstanding, bolt upright, upended

• involving different levels or stages of a hierarchy or process

• relating to the crown of the head

• denoting a point at the zenith or the highest point of something

• a vertical line or plane

• an upright structure

• the distance between the highest and lowest points of a ski area