Definitions of connected:

• adjective:   plugged in

  Example: "First check to see whether the appliance is connected"

• adjective:   wired together to an alarm system

  Example: "All the window alarms are connected"

• adjective:   joined or linked together
• adjective:   stored in, controlled by, or in direct communication with a central computer
• adjective:   related to or accompanying
• adjective:   being joined in close association