Source : Webster's Revised Unabridged Dictionary (1913)

Circulate \Cir"cu*late\, v. t.
   To cause to pass from place to place, or from person to
   person; to spread; as, to circulate a report; to circulate
   bills of credit.

   {Circulating pump}. See under {Pump}.

   Syn: To spread; diffuse; propagate; disseminate.

Circulate \Cir"cu*late\, v. i. [imp. & p. p. {Ciorculated}; P.
   pr. & vb. n. {Circulating}.] [L. circulatus, p. p. of
   circulare, v. t., to surround, make round, circulari, v. i.,
   to gather into a circle. See {Circle}.]
   1. To move in a circle or circuitously; to move round and
      return to the same point; as, the blood circulates in the
      body. --Boyle.

   2. To pass from place to place, from person to person, or
      from hand to hand; to be diffused; as, money circulates; a
      story circulates.

Source : WordNet®

circulate
     v 1: become widely known and passed on; "the rumor spread"; "the
          story went around in the office" [syn: {go around}, {spread}]
     2: cause to become widely known; "spread information";
        "circulate a rumor"; "broadcast the news" [syn: {circularize},
         {circularise}, {distribute}, {disseminate}, {propagate},
        {broadcast}, {spread}, {diffuse}, {disperse}, {pass around}]
     3: cause to be distributed; "This letter is circulating among
        the faculty" [syn: {pass around}, {pass on}, {distribute}]
     4: move through a space, circuit or system, returning to the
        starting point; "Blood circulates in my veins"; "The air
        here does not circulate"
     5: move in circles [syn: {circle}]
     6: cause to move in a circuit or system; "The fan circulates
        the air in the room"
     7: move around freely; "She circulates among royalty"
     8: cause to move around; "circulate a rumor" [syn: {mobilize},
        {mobilise}]