horizontal

adjective

hor·​i·​zon·​tal ˌhȯr-ə-ˈzän-tᵊl How to pronounce horizontal (audio)
ˌhär-
1
a
: of or relating to the apparent junction of earth and sky : situated near the horizon
b
: parallel to, in the plane of, or operating in a plane parallel to the horizon or to a baseline : level
horizontal distance
a horizontal engine
2
: relating to, directed toward, or consisting of individuals or entities of similar status or on the same level
horizontal mergers
horizontal hostility
3
medical : relating to or being transmission (as of a disease) by physical contact or proximity in contrast with inheritance
Genes are normally inherited from parents, but they can also be inserted into a genome by viruses, plasmids, and other foreign agents—a phenomenon called horizontal transfer.Stephan Reebs
compare vertical sense 4
horizontal noun
horizontality noun
horizontally adverb

Examples of horizontal in a Sentence

Recent Examples on the Web Infused with tightening technology and proprietary peptides, this high-tech cream minimizes the appearance of horizontal lines and creases in the neck. Jenny Berg, Vogue, 19 Apr. 2024 The three urban stigmata of the Seventies were dog turds on horizontal surfaces, graffiti on vertical ones, and blasting music in the ether. David Harsanyi, National Review, 18 Apr. 2024 At about a hundred feet, the aircraft shifted to horizontal flight. Gideon Lewis-Kraus, The New Yorker, 15 Apr. 2024 These counties border each other in a horizontal line in the eastern part of the state, immediately east of Jefferson City. Katie Hill, Outdoor Life, 10 Apr. 2024 The drill holes were mainly placed in step-out rows subparallel to the 2017-2018 drilling, oriented with azimuths 230 - 260, generally inclined at minus 65 degrees from horizontal. Fort Worth Star-Telegram, 7 Mar. 2024 During the event, two heliostats with moveable mirrors were used to direct images of the eclipsed Sun into a pair of horizontal telescopes. Rebecca Boyle, TIME, 8 Apr. 2024 Previously, clicking on a video in the Facebook app may have pulled up a horizontal video, or one that played in a Feed-like player. Bailey Schulz, USA TODAY, 3 Apr. 2024 Reducing Bathroom Fall Risks Walter’s advice for preventing bathroom falls included non-slip tile, assist bars (both horizontal and vertical) in and around showers, plus assist bars that double as towel bars. Jamie Gold, Forbes, 29 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'horizontal.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

see horizon

First Known Use

1555, in the meaning defined at sense 1a

Time Traveler
The first known use of horizontal was in 1555

Dictionary Entries Near horizontal

Cite this Entry

“Horizontal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/horizontal. Accessed 25 Apr. 2024.

Kids Definition

horizontal

1 of 2 adjective
hor·​i·​zon·​tal
ˌhȯr-ə-ˈzänt-ᵊl,
ˌhär-
1
: of or relating to the horizon
2
: parallel to the horizon : level
3
: being on the same level
horizontally
-ᵊl-ē
adverb

horizontal

2 of 2 noun
: a horizontal line or plane

Medical Definition

horizontal

adjective
hor·​i·​zon·​tal ˌhȯr-ə-ˈzänt-ᵊl, ˌhär- How to pronounce horizontal (audio)
1
: relating to or being a transverse plane or section of the body
2
a
: relating to or being transmission (as of a disease) by physical contact or proximity in contrast with inheritance compare vertical
b
: of or relating to horizontal gene transfer
horizontally adverb

Legal Definition

horizontal

adjective
hor·​i·​zon·​tal ˌhȯr-ə-ˈzän-təl, ˌhär- How to pronounce horizontal (audio)
: relating to, directed toward, or consisting of individuals or entities of similar status or on the same level
horizontally adverb
Last Updated: - Updated example sentences
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