Source : Webster's Revised Unabridged Dictionary (1913)

Dissent \Dis*sent"\, n.
   1. The act of dissenting; difference of opinion; refusal to
      adopt something proposed; nonagreement, nonconcurrence, or
      disagreement.

            The dissent of no small number [of peers] is
            frequently recorded.                  --Hallam.

   2. (Eccl.) Separation from an established church, especially
      that of England; nonconformity.

            It is the dissidence of dissent and the
            protestantism of the Protestant religion. --Burke.

   3. Contrariety of nature; diversity in quality. [Obs.]

            The dissent of the metals.            --Bacon.

   Syn: Disagreement; variance; difference; nonconcurrence;
        nonconformity.

Dissent \Dis*sent"\, v. i. [imp. & p. p. {Dissented}; p. pr. &
   vb. n. {Dissenting}.] [L. dissentire, dissentum; dis- +
   sentire to feel, think. See {Sense}.]
   1. To differ in opinion; to be of unlike or contrary
      sentiment; to disagree; -- followed by from.

            The bill passed . . . without a dissenting voice.
                                                  --Hallam.

            Opinions in which multitudes of men dissent from us.
                                                  --Addison.

   2. (Eccl.) To differ from an established church in regard to
      doctrines, rites, or government.

   3. To differ; to be of a contrary nature. --Hooker.

Source : WordNet®

dissent
     n 1: (law) the difference of one judge's opinion from that of the
          majority; "he expressed his dissent in a contrary
          opinion"
     2: a difference of opinion
     3: the act of protesting; a public (often organized)
        manifestation of dissent [syn: {protest}, {objection}]
     v 1: withhold assent; "Several Republicans dissented" [ant: {assent}]
     2: express opposition through action or words; "dissent to the
        laws of the country" [syn: {protest}, {resist}]
     3: be of different opinions; "I beg to differ!"; "She disagrees
        with her husband on many questions" [syn: {disagree}, {differ},
         {take issue}] [ant: {agree}]