inclusion

American  

[in-kloo-zhuhn] / ɪnˈklu ʒən /

noun

• inclusions
  plural

1. the act of including.

2. the state of being included.

3. something that is included.

4. the practice or policy of including and integrating all people and groups in activities, organizations, political processes, etc., especially those who are disadvantaged, have suffered discrimination, or are living with disabilities: Our company is committed to addressing issues of diversity and inclusion in the workplace.

   Political and civic inclusion is vital to a sustainable democracy.

   Our company is committed to addressing issues of diversity and inclusion in the workplace.

5. the educational policy of placing students with physical or mental disabilities in regular classrooms and providing them with certain accommodations.

6. Biology. a body suspended in the cytoplasm, as a granule.

7. Mineralogy. a solid body or a body of gas or liquid enclosed within the mass of a mineral.

8. Petrography. xenolith.

9. Logic, Mathematics. the relationship between two sets when the second is a subset of the first.

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inclusion British  

/ ɪnˈkluːʒən /

noun

1. the act of including or the state of being included

2. something included

3. geology a solid fragment, liquid globule, or pocket of gas enclosed in a mineral or rock

4. maths

   1. X⊆Y. the relation between two sets that obtains when all the members of the first are members of the second

   2. X⊂Y. the relation that obtains between two sets when the first includes the second but not vice versa

5. engineering a foreign particle in a metal, such as a particle of metal oxide

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Other Word Forms

Derived Forms

• noninclusion
  noun
• preinclusion
  noun
• reinclusion
  noun

Inflected Forms

Nouns

• inclusions
  plural

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Etymology

Origin of inclusion

First recorded in 1590–1600; inclusion def. 9 was first recorded in 1945–50; from Latin inclūsiōn- (stem of inclūsiō ) “a shutting in,” equivalent to inclūs(us) ( see incluse) + -iōn- noun suffix ( see -ion)

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Explanation

Inclusion is the act of including someone in something, like a school, club, or team. If you are familiar with the word include — meaning to make someone or something a part of something larger — then inclusion should make sense. You might be happy at your inclusion on the school's volleyball team. The inclusion of an actor in a movie is exciting. When there's a new President, people wait and see who will earn inclusion in the cabinet. In biology, an inclusion body is a very small body found within another on the cellular level.

Example Sentences

See Examples For:

inclusion inclusions

What makes the 49th-anniversary box set particularly special is the inclusion of the extra discs.

From Salon ● Oct. 14, 2026

But the traditional exchanges like Xetra and LSE have strict inclusion rules, particularly at the clearing house, as to what they will allow.

From The Wall Street Journal ● Oct. 8, 2026

His inclusion was criticised in South Africa and the tour was called off little more than a week later.

From BBC ● Sep. 29, 2026

In Iraq, up to 350,000 refugees and asylum seekers risk losing access to economic inclusion opportunities, it said.

From Barron's ● Sep. 28, 2026

“But for now, let’s get you to your inclusion classes and show off this cool new machine!”

From "Out of My Mind" by Sharon M. Draper

Our awards columnist surveys the most unexpected inclusions and omissions of the 2026 Emmy nominations.

From Los Angeles Times ● Jul. 8, 2026

SpaceX joined the Russell 1000 index and is set to join the Nasdaq-100 on July 7, marking major index inclusions.

From Barron's ● Jun. 29, 2026

Some are fragile and made mostly of fine-grained material, while others are stronger and contain visible inclusions embedded within the finer material.

From Science Daily ● May 26, 2026

The front-desk agent painstakingly explained all the inclusions.

From The Wall Street Journal ● May 20, 2026

A real diamond, his father used to say, is never entirely free of inclusions.

From "All the Light We Cannot See" by Anthony Doerr

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Related Words

• admittance
• formation
• incorporation
• involvement

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