Source : Webster's Revised Unabridged Dictionary (1913)

Around \A*round"\, adv. [Pref. a- + round.]
   1. In a circle; circularly; on every side; round.

   2. In a circuit; here and there within the surrounding space;
      all about; as, to travel around from town to town.

   3. Near; in the neighborhood; as, this man was standing
      around when the fight took place. [Colloq. U. S.]

   Note: See {Round}, the shorter form, adv. & prep., which, in
         some of the meanings, is more commonly used.

Around \A*round"\, prep.
   1. On all sides of; encircling; encompassing; so as to make
      the circuit of; about.

            A lambent flame arose, which gently spread Around
            his brows.                            --Dryden.

   2. From one part to another of; at random through; about; on
      another side of; as, to travel around the country; a house
      standing around the corner. [Colloq. U. S.]

Source : WordNet®

around
     adv 1: in the area or vicinity; "a few spectators standing about";
            "hanging around"; "waited around for the next flight"
            [syn: {about}]
     2: by a circular or circuitous route; "He came all the way
        around the base"; "the road goes around the pond"
     3: to or among many different places or in no particular
        direction; "wandering about with no place to go"; "people
        were rushing about"; "news gets around (or about)";
        "traveled around in Asia"; "he needs advice from someone
        who's been around"; "she sleeps around" [syn: {about}]
     4: in a circle or circular motion; "The wheels are spinning
        around"
     5: (of quantities) imprecise but fairly close to correct;
        "lasted approximately an hour"; "in just about a minute";
        "he's about 30 years old"; "I've had about all I can
        stand"; "we meet about once a month"; "some forty people
        came"; "weighs around a hundred pounds"; "roughly $3,000";
        "holds 3 gallons, more or less"; "20 or so people were at
        the party" [syn: {approximately}, {about}, {close to}, {just
        about}, {some}, {roughly}, {more or less}, {or so}]
     6: in or to a reversed position or direction; "about face";
        "brought the ship about"; "suddenly she turned around"
        [syn: {about}]
     7: to a particular destination either specified or understood;
        "she came around to see me"; "I invited them around for
        supper"
     8: all around or on all sides; "dirty clothes lying around (or
        about)"; "let's look about for help"; "There were trees
        growing all around"; "she looked around her" [syn: {about}]
     9: in circumference; "the trunk is ten feet around"; "the pond
        is two miles around"
     10: from beginning to end; throughout; "It rains all year round
         on Skye"; "frigid weather the year around" [syn: {round}]