Horizontal

Horizontal may refer to:


 * Horizontal plane, in astronomy, geography, geometry and other sciences and contexts
 * Horizontal coordinate system, in astronomy
 * Horizontalism, in monetary circuit theory
 * Horizontalism, in sociology
 * Horizontal market, in microeconomics
 * Horizontal (album), a 1968 album by the Bee Gees
 * "Horizontal" (song)" is a 1968 song by the Bee Gees