1. something that is oriented horizontally
1. parallel to or in the plane of the horizon or a base line
; - Example: "a horizontal surface"
The Collaborative International Dictionary of English v.0.48:
Horizontal \Hor`i*zon"tal\, a. [Cf. F. horizontal.]
1. Pertaining to, or near, the horizon. "Horizontal misty
2. Parallel to the horizon; on a level; as, a horizontalline
3. Measured or contained in a plane of the horizon; as,
Horizontal drill, a drilling machine having a horizontal
Horizontal engine, one the piston of which works
Horizontal fire (Mil.), the fire of ordnance and small arms
at point-blank range or at low angles of elevation.
Horizontal force (Physics), the horizontal component of the
earth's magnetic force.
Horizontal line (Descriptive Geometry & Drawing), a
constructive line, either drawn or imagined, which passes
through the point of sight, and is the chief line in the
projection upon which all verticals are fixed, and upon
which all vanishing points are found.
Horizontal parallax. See under Parallax.
Horizontal plane (Descriptive Geometry), a plane parallel
to the horizon, upon which it is assumed that objects are
projected. See Projection. It is upon the horizontal
plane that the ground plan of the buildings is supposed to
Horizontal projection, a projection made on a plane
parallel to the horizon.
Horizontal range (Gunnery), the distance in a horizontal
plane to which a gun will throw a projectile.
Horizontal water wheel, a water wheel in which the axis is
vertical, the buckets or floats revolving in a horizontal
plane, as in most turbines.
WordNet (r) 3.0 (2006):
adj 1: parallel to or in the plane of the horizon or a base
line; "a horizontal surface" [ant: inclined,
n 1: something that is oriented horizontally
Moby Thesaurus II by Grady Ward, 1.0:
78 Moby Thesaurus words for "horizontal":
arrowlike, billiard table, bowling green, dead flat, dead level,
dead straight, direct, earth, esplanade, even, flat, flatland,
flattened, floor, flush, ground, homaloid, homaloidal,
horizontal axis, horizontal fault, horizontal line,
horizontal parallax, horizontal plane, horizontal projection,
in a line, ledge, level, level line, level plane, lineal, linear,
mean sea level, parterre, plain, plane, platform, prairie, prone,
rectilineal, rectilinear, right, rolled, ruler-straight, sea level,
sea of grass, smooth, smoothed out, smoothened, squashed,
squashed flat, steppe, straight, straight-cut, straight-front,
straight-side, streamlined, supine, table, tabloid, tabular,
terrace, trodden, trodden flat, true, unbending, unbent, unbowed,
unbroken, uncurved, undeflected, undeviating, undistorted,
uninterrupted, unswerving, unturned, upright, vertical,