Definitions of bus:

• noun:   a vehicle carrying many passengers; used for public transport

  Example: "He always rode the bus to work"

• noun:   a car that is old and unreliable

  Example: "The fenders had fallen off that old bus"

• noun:   an electrical conductor that makes a common connection between several circuits

  Example: "The busbar in this computer can transmit data either way between any two components of the system"

• noun:   the topology of a network whose components are connected by a busbar
• verb:   remove used dishes from the table in restaurants
• verb:   ride in a bus
• verb:   send or move around by bus

  Example: "The children were bussed to school"