WordReference Random House Unabridged Dictionary of American English © 2017
in•clu•sion  (in klo̅o̅zhən),USA pronunciation n. 
  1. the act of including.
  2. the state of being included.
  3. something that is included.
  4. Cell Biology[Biol.]a body suspended in the cytoplasm, as a granule.
  5. Mineralogya solid body or a body of gas or liquid enclosed within the mass of a mineral.
  6. Geology, Rocks[Petrog.]xenolith.
  7. Mathematics, Philosophy[Logic, Math.]the relationship between two sets when the second is a subset of the first.
  • Latin inclūsiōn- (stem of inclūsiō) a shutting in, equivalent. to inclūs(us) (see incluse) + -iōn- -ion
  • 1590–1600; 1945–50 for def. 7;

WordReference Random House Learner's Dictionary of American English © 2017
in•clude /ɪnˈklud/USA pronunciation   v. [+ object], -clud•ed, -clud•ing. 
  1. to contain or have as part of a whole:[not: be + ~-ing]The meal includes dessert and coffee.
  2. to place (something) in a category:Whom would you include in your list?
in•clu•sion /ɪnˈkluʒən/USA pronunciation  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2017
in•clude  (in klo̅o̅d),USA pronunciation v.t.,  -clud•ed, -clud•ing. 
  1. to contain, as a whole does parts or any part or element:The package includes the computer, program, disks, and a manual.
  2. to place in an aggregate, class, category, or the like.
  3. to contain as a subordinate element;
    involve as a factor.
in•cluda•ble, in•cludi•ble, adj. 
  • Latin inclūdere to shut in, equivalent. to in- in-2 + -clūdere, combining form of claudere to shut (compare close)
  • late Middle English 1375–1425
    • 1.See corresponding entry in Unabridged embody.
      Include, comprehend, comprise, embrace imply containing parts of a whole. To
      include is to contain as a part or member, or among the parts and members, of a whole:The list includes many new names.To comprehend is to have within the limits, scope, or range of references, as either a part or the whole number of items concerned:The plan comprehends several projects.To comprise is to consist of, as the various parts serving to make up the whole:This genus comprises 50 species.Embrace emphasizes the extent or assortment of that which is included:The report embraces a great variety of subjects.
    • 1.See corresponding entry in Unabridged exclude, preclude.

Collins Concise English Dictionary © HarperCollins Publishers::

inclusion /ɪnˈkluːʒən/ n
  1. the act of including or the state of being included
  2. something included

'inclusion' also found in these entries:

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