# inclusion

Pronunciation: US say "in-KLOO-zhuhn" /ɪnˈkluːʒən/; UK

## Noun

1. The act of taking something in by adding it to a group, set, or total.
   - Simple: The act of adding someone or something to a group, set, or total.
   - _The committee debated the inclusion of additional categories in the final report._
   - _His inclusion on the guest list surprised several longtime regulars._
2. An item added or attached to a group, set, or total.
   - Simple: Something added to a group, set, or total.
   - _The bonus track was a surprising inclusion on the reissued album._
   - _Editors reviewed each proposed inclusion before finalizing the anthology._
3. A foreign particle or substance enclosed within a material.
   - Simple: A bit of foreign material trapped inside another material.
   - _An inclusion in the steel caused the beam to crack under load._
   - _Metallurgists examined the casting for inclusions before approving it._
4. Material trapped inside a mineral as it formed, often visible as a flaw in a precious stone.
   - Simple: A bit of material trapped inside a gem or mineral while it was forming.
   - _The jeweler spotted an inclusion near the center of the emerald._
   - _Gemologists use inclusions to tell natural stones from synthetic ones._
5. A clump of stainable material gathered in a cell's nucleus or cytoplasm.
   - Simple: A clump of material inside a cell that soaks up dye and can be seen under a microscope.
   - _The cytologist identified an inclusion within the cell nucleus._
   - _A viral inclusion in the cytoplasm confirmed the infection._
6. An object lying completely within a tissue, such as a cyst trapped beneath the skin.
   - Simple: An object fully enclosed within body tissue, like a small cyst under the skin.
   - _The biopsy revealed an inclusion lodged deep within the dermis._
   - _Doctors traced the lump to an inclusion buried in the soft tissue._
7. A mapping in which the domain is a subset of the larger set it maps into, sending each element to itself.
   - Simple: In math, a map that sends each item of a smaller set to the same item in the bigger set.
   - _The inclusion maps each element of the subset to itself in the larger set._
   - _An inclusion from the integers into the rationals preserves every element unchanged._

## Noun

8. A restriction or limitation imposed upon something. *(obsolete)*
   - Simple: A limit or restriction placed on something.
   - _The charter bound the guild with an inclusion that none could escape._
   - _He chafed under the inclusion the elders had placed on his speech._

## Origin

This word was borrowed from Latin inclusio, from the verb inclūdō ("to shut in, enclose, insert"), which combines in- ("in") with claudō ("to shut"), ultimately going back to Proto-Indo-European *kleh₂u- ("key, hook, nail"). It is a doublet of enclosure.

Source: DictionaryAI, https://dictionaryai.com/define/inclusion (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).