DictionaryAI

case

KAYS/keɪs/

Pluralcases

24 meanings of case

Practice

  1. 1
    instancenouncountable
    A particular situation, set of circumstances, or state of affairs; an instance of something happening.

    It turned out to be a case of simple miscommunication between the two teams.

    Whether the rule applies depends on the specifics of each case.

    UsageCommon frames: in this case, in any case, in case of fire. In case it rains means as a precaution, before you know.

    Similarinstance, example, situation, matter, occurrence

  2. 2
    legal matternouncountable
    A matter brought before a court, such as a lawsuit or a criminal prosecution.

    The case against the company finally went to trial after three years of delays.

    Several similar cases were combined into one trial.

    UsageA case is brought, heard, won or lost; people speak of the case against someone.

    Similarlawsuit, suit, action, trial

    Note

    In law a case is the whole proceeding, and famous ones are named for a party. Baroness Orczy's man in the corner speaks of sensations "surpassing those of the Tichborne case," and she titled her own stories the same way, as in "The Tremarn Case."

    Checked 1 Nov 2026 · 1 fact

  3. 3
    illness countnouncountable
    A single occurrence of a disease or other condition, or of a particular set of symptoms.

    Hospitals reported a sharp rise in measles cases over the winter.

    Each case was logged with the patient's age and symptoms.

    UsagePatterns: a case of measles, measles cases.

    Similarinstance, occurrence

    Note

    Medicine counts illness one person at a time, so cases are what get reported, logged and tallied overnight. The word has a technical opposite, noncase, for someone who does not meet the definition. Studies of a disease often compare cases with noncases to find what sets the sick apart.

    Checked 30 Oct 2026 · 3 facts

    • Epidemiologists count individual cases and collect information about the people affected. archive.cdc.gov
    • Case definitions distinguish cases from noncases. cdc.gov
    • Disease studies compare affected and unaffected groups to investigate differences such as previous exposure. cdc.gov
  4. 4
    nouncountable
    An instance or event studied as a topic of investigation.

    The researcher chose this hospital as her primary case.

    Business schools often teach through real-world cases.

    UsageOften in the compound case study.

    Similarexample, instance

    Note

    A research word: one bounded instance examined closely so that it can speak for others. Researchers choose a case much as they would choose a sample.

    Checked 1 Nov 2026 · 2 facts

    • Case research examines bounded instances closely and can produce insights applicable beyond the particular case. pmc.ncbi.nlm.nih.gov
    • Researchers can select cases purposefully, as they do with purposive samples. pmc.ncbi.nlm.nih.gov
  5. 5
    protective covernouncountable
    A container, box, or covering that holds or protects something, such as the outer casing of a device or a frame around an opening.

    He kept the violin in a padded case between rehearsals.

    The museum stored the medals in protective cases.

    UsageUsually with the thing first: a violin case, a pencil case, a phone case.

    Similarcontainer, box, holder, cover

  6. 6
    argument fornouncountable
    The evidence and arguments offered in favor of a claim, position, or course of action.

    The author makes a persuasive case for taxing sugary drinks.

    Supporters of the new bridge have yet to explain how their case holds up against the cost figures.

    UsageYou make, build or present a case for or against something; there is a case for admits an argument.

    Similarargument

    Note

    Courtroom language lent this sense its picture: each side in a lawsuit presents its case, and a lawyer who is finished rests it.

    Checked 1 Nov 2026 · 2 facts

    • Opposing sides present their cases in court. justice.gov
    • A lawyer rests a case after finishing the presentation of evidence. justice.gov
  7. 7
    client matternouncountable
    A matter that a professional handles, such as a crime under police investigation or a client's or patient's situation, together with the work it involves.

    The nurse reviewed each case before her morning rounds.

    Each social worker in our county juggles more than forty cases at once.

    UsageDetectives work on or take on a case; on the case means busy dealing with it.

  8. 8
    box of goodsnouncountable
    A box or carton holding a set number of identical items, such as 24 bottles or cans of a drink.

    The warehouse received three cases of light bulbs.

    Wholesale buyers purchase printer paper by the case rather than the ream.

    UsageGoods are bought and counted by the case: a case of water.

    Similarcrate, carton, box, pack

Practice

Can you tell the meanings of case apart? Answer 3 quick questions from this page, or write your own sentence and AI will check it.

Origins

Meanings 1–4, 6–7, 12, 16–17, 24

Latin cadō ("to fall, drop") gave the noun cāsus, meaning "a fall, a falling," and also "accident, event, occurrence, occasion." This passed through Old French cas ("an event") into Middle English cas.

Checked 1 Nov 2026 · 5 facts

Meanings 5, 8–11, 13–15, 18–23

Latin capiō ("to take, seize, hold") gave capsa ("box, bookcase"). This became casse in Old Northern French (Old French had chasse, "box, chest, case") and then Middle English case. Cash, chase, and chasse are doublets.

Checked 1 Nov 2026 · 5 facts