Source : Webster's Revised Unabridged Dictionary (1913)

Involve \In*volve"\, v. t. [imp. & p. p. {Involved}; p. pr. &
   vb. n. {Involving}.] [L. involvere, involutum, to roll about,
   wrap up; pref. in- in + volvere to roll: cf. OF. involver.
   See {Voluble}, and cf. {Involute}.]
   1. To roll or fold up; to wind round; to entwine.

            Some of serpent kind . . . involved Their snaky
            folds.                                --Milton.

   2. To envelop completely; to surround; to cover; to hide; to
      involve in darkness or obscurity.

            And leave a sing[`e]d bottom all involved With
            stench and smoke.                     --Milton.

   3. To complicate or make intricate, as in grammatical
      structure. ``Involved discourses.'' --Locke.

   4. To connect with something as a natural or logical
      consequence or effect; to include necessarily; to imply.

            He knows His end with mine involved.  --Milton.

            The contrary necessarily involves a contradiction.
                                                  --Tillotson.

   5. To take in; to gather in; to mingle confusedly; to blend
      or merge. [R.]

            The gathering number, as it moves along, Involves a
            vast involuntary throng.              --Pope.

            Earth with hell To mingle and involve. --Milton.

   6. To envelop, infold, entangle, or embarrass; as, to involve
      a person in debt or misery.

   7. To engage thoroughly; to occupy, employ, or absorb.
      ``Involved in a deep study.'' --Sir W. Scott.

   8. (Math.) To raise to any assigned power; to multiply, as a
      quantity, into itself a given number of times; as, a
      quantity involved to the third or fourth power.

   Syn: To imply; include; implicate; complicate; entangle;
        embarrass; overwhelm.

   Usage: To {Involve}, {Imply}. Imply is opposed to express, or
          set forth; thus, an implied engagement is one fairly
          to be understood from the words used or the
          circumstances of the case, though not set forth in
          form. Involve goes beyond the mere interpretation of
          things into their necessary relations; and hence, if
          one thing involves another, it so contains it that the
          two must go together by an indissoluble connection.
          War, for example, involves wide spread misery and
          death; the premises of a syllogism involve the
          conclusion.

Source : WordNet®

involve
     v 1: connect closely and often incriminatingly; "This new ruling
          affects your business" [syn: {affect}, {regard}]
     2: engage as a participant; "Don't involve me in your family
        affairs!"
     3: have as a necessary feature or consequence; entail; "This
        decision involves many changes" [syn: {imply}]
     4: require as useful, just, or proper; "It takes nerve to do
        what she did"; "success usually requires hard work"; "This
        job asks a lot of patience and skill"; "This position
        demands a lot of personal sacrifice"; "This dinner calls
        for a spectacular dessert"; "This intervention does not
        postulates a patient's consent" [syn: {necessitate}, {ask},
         {postulate}, {need}, {require}, {take}, {call for}, {demand}]
        [ant: {obviate}]
     5: contain as a part; "Dinner at Joe's always involves at least
        six courses"
     6: wrap; "The tower was involved in mist"
     7: occupy or engage the interest of; "His story completely
        involved me during the entire afternoon"
     8: make complex or intricate or complicated; "The situation was
        rather involved"