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

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)

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

The artwork introduced tension between Indigenous traditions and Western conventions through the inclusion of Mai’s robe, turban and hand tattoos.

From Los Angeles Times ● Aug. 18, 2026

The Federal Communications Commission signed off in February after Charter rolled back some diversity, equity and inclusion policies in line with the commission’s request.

From The Wall Street Journal ● Aug. 13, 2026

"The members recommended Ervebo, the only licensed Ebola vaccine, be prioritised for inclusion in a randomised clinical trial in the context of the ongoing outbreak," a WHO statement said.

From Barron's ● Aug. 7, 2026

The IPF remains steadfast in its commitment to equality, inclusion, integrity, and fair play.

From BBC ● Aug. 5, 2026

In that moment, my teammates reassured me that they welcomed the diversity of our team and wanted to show the world what the United States truly stood for: inclusion and diversity.

From "Proud" by Ibtihaj Muhammad

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

But, in a ceremony which aims to celebrate multimillion-dollar productions and independent games made by tiny teams, there are also some surprising inclusions and omissions.

From BBC ● Mar. 12, 2026

The Grenoble group analyzed strontium isotopes and trace elements in melt inclusions trapped inside 3.3-billion-year-old olivine crystals, providing rare geochemical snapshots of early Earth.

From Science Daily ● Dec. 4, 2025

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

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

Related Words

• admittance
• formation
• incorporation
• involvement