horizontal

noun adjective

Stress: third syllable

Syllables: hor-i-zon-tal (4)
English Definition

Parallel to the plane of the horizon; at right angles to the vertical

Example Sentence

Draw a horizontal line on the paper.

US IPA /ˌhɔːrɪˈzɑːntl/
UK IPA /ˌhɒrɪˈzɒntl/

Synonyms

flat level parallel even aligned

Antonyms

vertical upright perpendicular