isolation

American  

[ahy-suh-ley-shuhn, is-uh-] / ˌaɪ səˈleɪ ʃən, ˌɪs ə- /

noun

1. an act or instance of isolating.

2. the state of being isolated.

3. the complete separation from others of a person suffering from contagious or infectious disease; quarantine.

   Synonyms:

   segregation

4. the separation of a nation from other nations by isolationism.

5. Psychoanalysis. a process whereby an idea or memory is divested of its emotional component.

6. Sociology. social isolation.

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isolation British  

/ ˌaɪsəˈleɪʃən /

noun

1. the act of isolating or the condition of being isolated

2. (of a country, party, etc) nonparticipation in or withdrawal from international politics

3. med

   1. social separation of a person who has or is suspected of having a contagious disease Compare quarantine

   2. ( as modifier )

      an isolation hospital

4. sociol a lack of contact between persons, groups, or whole societies

5. social psychol the failure of an individual to maintain contact with others or genuine communication where interaction with others persists

6. without regard to context, similar matters, etc

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Synonym Usage

See solitude.

Other Word Forms

Derived Forms

• postisolation
  adjective
• reisolation
  noun
• anti-isolation
  adjective

Etymology

Origin of isolation

First recorded in 1825–35; isolate + -ion

Explanation

Isolation means completely alone, like the stranded skiers who were in total isolation after an avalanche stranded them at the top of a mountain. People who live in isolation are completely cut off from the rest of the world, like the hermit who lives in a lonely mountain cabin because no one understands his desire to collect thimbles. A really contagious illness can land patients in isolation at their local hospital, kept separate from the rest of the hospital so they don't share their disease with the other patients. A country can exist in isolation, left alone because other nations don't agree with its policies.

Example Sentences

Isolation and quarantine measures have also now been put in place for those in contact with people on the cruise ship.

From Barron's • May 7, 2026

Isolation could be particularly difficult for pupils with certain types of Send, she added.

From BBC • Jan. 28, 2026

Isolation is a major sign of elder financial abuse, and preventing you from seeing your mother is a huge red flag.

From MarketWatch • Dec. 30, 2025

Isolation is linked to a 32% higher risk of all-cause mortality.

From The Wall Street Journal • Oct. 13, 2025

Isolation, even, to keep the B. cepacia far away from me.

From "Five Feet Apart" by Rachael Lippincott

Related Words

• confinement
• desolation
• remoteness
• segregation
• solitude