Definitions of circulate:

• verb:   move around freely

  Example: "She circulates among royalty"

• verb:   move through a space, circuit or system, returning to the starting point

  Example: "Blood circulates in my veins"

• verb:   cause to move in a circuit or system

  Example: "The fan circulates the air in the room"

• verb:   cause to be distributed
• verb:   cause to become widely known

  Example: "Circulate a rumor"

• verb:   move in circles
• verb:   cause to move around

  Example: "Circulate a rumor"

• verb:   become widely known and passed on