English Reference
noun · verb

lawsuit

n. · v.
US /ˈɫɔˌsut/ UK /lˈɔːsuːt/ law·suit UK spelling lawsuit's, lawsuit's, lawsuiting

  1. 01 B2 Upper Intermediate Law

    n.a formal disagreement that people take to a court of law so a judge can decide who is right.

    n.a case in civil law where one or more parties bring a dispute before a court for resolution.

    Simple

    The company faced a massive lawsuit after their product caused several injuries.

    In context

    The environmental group filed a class-action lawsuit against the manufacturer, alleging that toxic runoff had contaminated the local water supply for decades.

    Usage

    Commonly used with the verbs 'file', 'bring', or 'win'.

    legal actionsuitlitigationcase
  2. 02 C2 Proficiency Archaic Law

    v.to start a legal case against someone.

    v.to initiate or pursue a legal claim against a person or entity in a court of law.

    Simple

    In the old story, the merchant threatened to lawsuit his rival over the broken contract.

    In context

    The historical documents reveal an era where individuals would frequently lawsuit one another over minor property boundary disputes.

    Usage

    This verb form is extremely rare in modern English; 'to sue' is the standard equivalent.

    Teacher's tip

    While historically recorded as a verb, modern speakers exclusively use 'sue' for the action and 'lawsuit' for the noun.

    suelitigate

Usage lawsuit filed

The claimants' lawsuit alleges Wondermind failed to meet "even its most basic obligations, such as timely paying its employees and vendors".

BBC News· 14 Aug 2026

ExxonMobil has described the lawsuits against it as “meritless” .

The Guardian· 10 Aug 2026

From law + suit.

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

This entry
Level C1 · Advanced
Frequency Common
Updated