The Collaborative International Dictionary of English v.0.48:

Inclusive \In*clu"sive\, a. [Cf. F. inclusif.]
   [1913 Webster]
   1. Inclosing; encircling; surrounding.
      [1913 Webster]

            The inclusive verge
            Of golden metal that must round my brow. --Shak.
      [1913 Webster]

   2. Comprehending the stated limit or extremes; as, from
      Monday to Saturday inclusive, that is, taking in both
      Monday and Saturday; -- opposed to exclusive.
      [1913 Webster]

WordNet (r) 3.0 (2006):

inclusive
    adj 1: including much or everything; and especially including
           stated limits; "an inclusive art form"; "an inclusive
           fee"; "his concept of history is modern and inclusive";
           "from Monday to Friday inclusive" [ant: exclusive]

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

inclusive

    In domain theory, a predicate P : D -> Bool is
   inclusive iff

    For any chain C, a subset of D, and
    for all c in C,
    P(c) => P(lub C)

   In other words, if the predicate holds for all elements of an
   increasing sequence then it holds for their least upper
   bound.

   ("lub is written in LaTeX as \sqcup).

   (1995-02-03)