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

Some longtime New Yorkers were puzzled over their inclusion on the list while others complained that the publication was an invasion of privacy.

From The Wall Street Journal ● Aug. 25, 2026

Some journalists cheekily celebrated their inclusion — just as, in the 1970s, U.S. journalists and others named on President Nixon’s “enemies list” viewed their presence as a badge of honor.

From Los Angeles Times ● Aug. 21, 2026

The FCC said the review of the network’s licenses would focus on whether it had been discriminatory in its diversity and inclusion policies.

From MarketWatch ● Aug. 18, 2026

Having taken the role on an interim basis during the Six Nations, Mitchell said that the coaching group is "smarter" with Scarratt's inclusion.

From BBC ● Aug. 12, 2026

I love the fact that she’s in all my inclusion classes.

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

But in the gallery dedicated to the beginnings of Pop, most of the inclusions are head-scratching.

From The Wall Street Journal ● Aug. 21, 2026

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

From Los Angeles Times ● Jul. 8, 2026

France, who retained the title in the most dramatic of circumstances by beating England in Paris, also have four players chosen, while Italy and Scotland boast three inclusions and Wales one.

From BBC ● Mar. 19, 2026

Researchers also detected rare inclusions of lechatelierite, a high temperature glassy silica that forms during extreme heating, further confirming an impact origin.

From Science Daily ● Mar. 1, 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

Related Words

• admittance
• formation
• incorporation
• involvement