English Reference

Word

marginal

Phoneticsmar·gin·al, stress on the first syllable

US/ˈmɑɹdʒənəɫ/

UK/mˈɑːdʒɪnəl/

Definitions

01small or minor

B2 · Upper Intermediate

adj. very small in amount or effect; not very important.

adj. of minor importance, size, or effect; slight or insignificant.

“The new law only made a marginal difference to the lives of most people.”

“The proposed changes to the tax code are expected to have only a marginal impact on the overall economy this fiscal year.”

02at the edge

C1 · Advanced Academic

adj. relating to or located at the edge or border of something.

adj. pertaining to or situated at a margin or border; peripheral.

“The scientist made some marginal notes in the book while she was reading.”

“The study focuses on marginal land that is difficult to farm because it sits on the edge of the desert.”

Antonyms

03socially excluded

C1 · Advanced Sociology Academic

adj. describing people or groups who are treated as unimportant and kept away from power.

adj. relating to groups or individuals excluded from the main social, economic, or political life of a community.

“The charity works with marginal groups who often struggle to find housing.”

“Sociologists argue that marginal communities often develop unique cultural identities as a response to their exclusion from mainstream society.”

Synonyms

04incremental cost or benefit

C1 · Advanced Economics Technical

adj. relating to the cost or benefit of producing or buying one more of something.

adj. relating to the change in total cost or revenue resulting from a one-unit increase in production or consumption.

“The marginal cost of making one extra phone is actually very low.”

“In a perfectly competitive market, firms continue to produce until the marginal cost equals the marginal revenue.”

Antonyms

05politically uncertain

B2 · Upper Intermediate Politics British English

adj. describing a seat in parliament that was won by a very small number of votes.

adj. referring to a constituency or seat held by a very small majority, making it vulnerable to a change in party control.

“The prime minister visited several marginal seats during the final week of the election.”

“The party focused its advertising budget on marginal constituencies where a shift of just a few hundred votes could determine the outcome.”

Antonyms

06a swing seat

C1 · Advanced Countable noun Politics British English · Formal

n. a voting area that could easily change which party it supports.

n. a constituency or electoral district won by a narrow margin, often targeted by political parties during campaigns.

“If the government loses this marginal, they might lose the whole election.”

“Political analysts are closely watching the urban marginals, as these seats often serve as bellwethers for national voting trends.”

Synonyms

swing seatbattleground

Antonyms

safe seat

Collocations

Common phrases and expressions where native English speakers use the word “marginal” in context.

Adjective

01. marginal effect

“The new policy had only a marginal effect on the overall unemployment rate.”

adj + noun

Real-World Examples

“But CRA contends it was really employment income and should be fully taxable at Canada’s top marginal rate — meaning Tavares owes over $6.8 million plus $1.2 million in interest.”
Toronto Sun 18 Aug 2026
“He was motivated to write "Disposable Workers," he says, because marginal workers have been significantly overlooked.”
Phys.org 18 Aug 2026

Etymology

Learned borrowing from Medieval Latin marginālis, equivalent to margin + -al.

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

Word family

ADJECTIVE

marginal(C1)

Domains

EconomicsGeographyPoliticsSociology

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.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL 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: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · AdvancedOxford
Updated

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English Reference