Main entry: perpendicular, vertical
Definition: at right angles to the plane of the horizon or a base line
Usage: a vertical camera angle; the monument consists of two vertical pillars supporting a horizontal slab; measure the perpendicular height
Antonyms: horizontal
Definition: parallel to or in the plane of the horizon or a base line
Antonyms: inclined
Definition: at an angle to the horizontal or vertical position
Main entry: erect, upright, vertical
Definition: upright in position or posture
Usage: 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
Antonyms: unerect
Definition: not upright in position or posture
Definition: (of persons) having the torso erect and legs bent with the body supported on the buttocks
Antonyms: running
Definition: executed or initiated by running
Antonyms: running
Definition: (of fluids) moving or issuing in a stream
Antonyms: curly
Definition: (of hair) having curls or waves
Antonyms: crooked
Definition: having or marked by bends or angles; not straight or aligned
Definition: having or marked by a curve or smoothly rounded bend
Definition: not straight; dishonest or immoral or evasive
Main entry: vertical
Definition: of or relating to different levels in a hierarchy (as levels of social class or income group)
Usage: vertical social mobility
Antonyms: nonhierarchic, nonhierarchical
Definition: not classified hierarchically