horizontal

The opposite of vertical, something horizontal is arranged sideways, like a person lying down.

When you sleep (unless you're a horse), your body is horizontal: horizontal things are parallel to the ground or running in the same direction as the horizon. If you stack books horizontally, then they're on their side. You hear a lot about horizontal lines in geometry: If you picture a square, the top and bottom lines are horizontal lines.

Definitions of horizontal
1

n something that is oriented horizontally

Type of:
orientation
position or alignment relative to points of the compass or other specific directions

adj parallel to or in the plane of the horizon or a base line

“a horizontal surface”
Synonyms:
crosswise
in the shape of (a horizontal piece on) a cross
flat
horizontally level
level
being on a precise horizontal plane
naiant, swimming
applied to a fish depicted horizontally
Antonyms:
perpendicular, vertical
at right angles to the plane of the horizon or a base line
inclined
at an angle to the horizontal or vertical position
gradual
(of a topographical gradient) not steep or abrupt
steep
having a sharp inclination
plumb
exactly vertical
upended
turned up on end
unsloped, upright
in a vertical position; not sloping
atilt, canted, leaning, tilted, tipped
departing or being caused to depart from the true vertical or horizontal
aslant, aslope, diagonal, slanted, slanting, sloped, sloping
having an oblique or slanted direction
high-pitched
set at a sharp or high angle or slant
low-pitched
set at a low angle or slant
monoclinal
of a geological structure in which all strata are inclined in the same direction
pitched
set at a slant
salient
represented as leaping (rampant but leaning forward)
sidelong
inclining or directed to one side
skew, skewed
having an oblique or slanting direction or position
oblique
slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angled
straight
having no deviations
show more antonyms...

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