The Collaborative International Dictionary of English v.0.48:

Include \In*clude"\, v. t. [imp. & p. p. Included; p. pr. &
   vb. n. Including.] [L. includere, inclusum; pref. in- in +
   claudere to shut. See Close, and cf. Enclose.]
   [1913 Webster]
   1. To confine within; to hold; to contain; to shut up; to
      inclose; as, the shell of a nut includes the kernel; a
      pearl is included in a shell.
      [1913 Webster]

   2. To comprehend or comprise, as a genus the species, the
      whole a part, an argument or reason the inference; to
      contain; to embrace; as, this volume of Shakespeare
      includes his sonnets; he was included in the invitation to
      the family; to and including page twenty-five.
      [1913 Webster]

            The whole included race, his purposed prey.
                                                  --Milton.
      [1913 Webster]

            The loss of such a lord includes all harm. --Shak.
      [1913 Webster]

   3. To conclude; to end; to terminate. [Obs.]
      [1913 Webster]

            Come, let us go; we will include all jars
            With triumphs, mirth, and rare solemnity. --Shak.

   Syn: To contain; inclose; comprise; comprehend; embrace;
        involve.
        [1913 Webster]

WordNet (r) 3.0 (2006):

include
    v 1: have as a part, be made up out of; "The list includes the
         names of many famous writers" [ant: exclude]
    2: consider as part of something; "I include you in the list of
       culprits" [ant: except, exclude, leave off, leave
       out, omit, take out]
    3: add as part of something else; put in as part of a set,
       group, or category; "We must include this chemical element in
       the group"
    4: allow participation in or the right to be part of; permit to
       exercise the rights, functions, and responsibilities of;
       "admit someone to the profession"; "She was admitted to the
       New Jersey Bar" [syn: admit, let in, include] [ant:
       exclude, keep out, shut, shut out]

The Free On-line Dictionary of Computing (19 January 2023):

include

   [Usenet] 1. To duplicate a portion (or whole) of another's
   message (typically with attribution to the source) in a reply
   or followup, for clarifying the context of one's response.
   See the discussion of inclusion styles under "Hacker Writing
   Style".

   2. [C] "#include " has appeared in sig
   blocks to refer to a notional "standard disclaimer file".

   [Jargon File]


The Jargon File (version 4.4.7, 29 Dec 2003):

include
 vt.

    [Usenet]

    1. To duplicate a portion (or whole) of another's message (typically with
    attribution to the source) in a reply or followup, for clarifying the
    context of one's response. See the discussion of inclusion styles under
    Hacker Writing Style.

    2. [from C] #include  has appeared in sig blocks to refer
    to a notional standard disclaimer file.