Source : Webster's Revised Unabridged Dictionary (1913)

Mob \Mob\, n. [See {Mobcap}.]
   A mobcap. --Goldsmith.

Mob \Mob\, v. t.
   To wrap up in, or cover with, a cowl. [R.]

Mob \Mob\, n. [L. mobile vulgus, the movable common people. See
   {Mobile}, n.]
   1. The lower classes of a community; the populace, or the
      lowest part of it.

            A cluster of mob were making themselves merry with
            their betters.                        --Addison.

   2. Hence: A throng; a rabble; esp., an unlawful or riotous
      assembly; a disorderly crowd.

            The mob of gentlemen who wrote with ease. --Pope.

            Had every Athenian citizen been a Socrates, every
            Athenian assembly would still have been a mob.
                                                  --Madison.

            Confused by brainless mobs.           --Tennyson.

   {Mob law}, law administered by the mob; lynch law.

   {Swell mob}, well dressed thieves and swindlers, regarded
      collectively. [Slang] --Dickens.

Mob \Mob\, v. t. [imp. & p. p. {Mobbed}; p. pr. & vb. n.
   {Mobbing}.]
   To crowd about, as a mob, and attack or annoy; as, to mob a
   house or a person.

Source : WordNet®

mob
     v : press tightly together or cram; "The crowd packed the
         auditorium" [syn: {throng}, {pack}, {pile}, {jam}]
     [also: {mobbing}, {mobbed}]

mob
     n 1: a disorderly crowd of people [syn: {rabble}, {rout}]
     2: a loose affiliation of gangsters in charge of organized
        criminal activities [syn: {syndicate}, {crime syndicate},
        {family}]
     3: an association of criminals; "police tried to break up the
        gang"; "a pack of thieves" [syn: {gang}, {pack}, {ring}]
     [also: {mobbing}, {mobbed}]