English Reference
adjective · noun

marginal

adj. · n.
US /ˈmɑɹdʒənəɫ/ UK /mˈɑːdʒɪnəl/ mar·gin·al UK spelling marginals

  1. 01 B2 Upper Intermediate

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

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

    Simple

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

    In context

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

  2. 02 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.

    Simple

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

    In context

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

  3. 03 C1 Advanced Academic Sociology

    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.

    Simple

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

    In context

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

  4. 04 C1 Advanced Technical Economics

    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.

    Simple

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

    In context

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

  5. 05 B2 Upper Intermediate British English Politics

    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.

    Simple

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

    In context

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

  6. 06 C1 Advanced British EnglishFormal Politics

    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.

    Simple

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

    In context

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

    swing seatbattleground
    safe seat

Usage marginal effect

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

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

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

This entry
Level C1 · Advanced
Frequency Frequent
Updated