English Reference

Word

horizontally

Phoneticshor·i·zon·tal·ly, stress on the third syllable

US/ˌhɔɹɪˈzɑntəɫi/

UK/hˌɒɹɪzˈɒntəli/

Adverb of manner

Definition

adv. in a flat position, like the line where the sky meets the sea. You use this to describe things that go from left to right rather than up and down.

adv. parallel to the plane of the horizon; at right angles to the vertical. Often describes the orientation of objects or the direction of movement across a surface.

Examples

“The stripes on his shirt run horizontally.”

“To save space in the small apartment, we stacked the books vertically rather than laying them horizontally on the shelf.”

“The data is arranged horizontally across the spreadsheet, with each row representing a unique participant and each column representing a specific variable in the study.”

Examples

simple

“The stripes on his shirt run horizontally.”

contextual

“To save space in the small apartment, we stacked the books vertically rather than laying them horizontally on the shelf.”

complex

“The data is arranged horizontally across the spreadsheet, with each row representing a unique participant and each column representing a specific variable in the study.”

Usage

Typically follows the verb it modifies or appears at the end of the clause.

Real-World Examples

“UOG uses a process known as fracking to extract fuel from the ground, shooting a high-pressure mixture of water, sand and chemicals to break apart rock horizontally from the initial borehole.”
Phys.org 24 Aug 2026
“The long, narrow feature oriented horizontally in this corner is the Herbig-Haro object HH 797 .”
Phys.org 15 Sept 2026

Etymology

From horizontal + -ly.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

ADVERB

horizontally(B2)

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper Intermediate
Updated

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English Reference