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hor·i·zon·tal

horizontal

part of speech:	adjective
definition:	If something is horizontal, it goes from side to side, not up and down. When people sleep, they usually lie in a horizontal position. It is easier to walk on a horizontal surface rather than up or down a hill.If you don't hold the tray in a horizontal position, things might fall off it.Walls in a house are usually vertical. They go up and down. But floors are usually horizontal. synonyms: level antonyms: vertical similar words: flat
related words:	even
derivation:	horizontally (adv.)

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