horizontal.
Perpendicular to the vertical; parallel to the plane of the horizon; level, flat.
Meaning & usage
Perpendicular to the vertical; parallel to the plane of the horizon; level, flat.
horizontal lines
Relating to horizontal markets
Pertaining to the horizon.
Involving wines of the same vintages but from different wineries.
Having the two notes sound successively.
Relating to sexual intercourse.
horizontal tango
Being or relating to the transmission of organisms between biotic and/or abiotic members of an ecosystem that are not in a parent-progeny relationship.
Infectious agents may spread by horizontal transmission.
Where this word comes from
Borrowed from Middle French horizontal, from horizon, horizonte, from Latin horizōn (stem horizont-).
A horizontal component of a structure.
Horizon.
A Tasmanian shrub or small tree whose main trunk tends to lean over and grow horizontally, Anodopetalum biglandulosum
Where this word comes from
Borrowed from Middle French horizontal, from horizon, horizonte, from Latin horizōn (stem horizont-).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.