S: (v) circulate (move through a space, circuit or system, returning to the starting point) "Blood circulates in my veins"; "The air here does not circulate"
S: (v) circulate (cause to move in a circuit or system) "The fan circulates the air in the room"
S: (v) circulate (move around freely from person to person or from place to place) "She circulates among royalty"