bus

Definitions

Cars & Driving

  • noun a vehicle for carrying a fairly large number of passengers, usually for payment, over a set route and with a fixed time schedule.

Computing

  • noun a communication link consisting of a set of leads or wires which connects different parts of a computer hardware system, and over which data is transmitted and received by various circuits in the system.
  • noun a central source of information that supplies several devices

Construction

  • An electric conductor, often a metal bar, that serves as a common connection for two or more circuits. A bus usually carries a large current. See also bus bar.

Electronics

  • A set of conductors which serve as a channel which provides parallel data transfer from one part of a computer to another. An example is the local bus, which is the pathway between the CPU, the memory, and high-speed peripherals. A bus is subdivided into two parts: the address bus, which identifies specific locations of stored data, and the data bus, which transfers the data. The width of the bus determines the amount of data which can be transferred at a time. A 256-bit bus, for example, can transfer 256 bits at a time. The clock speed determines how fast these transfers take place. Also called computer bus.
  • In a communications network, a common cable, or wire, that connects all nodes. Also called network bus.
  • A heavy and rigid conductor, which is normally non-insulated, that is utilized to carry large currents between several circuits. Also called bus bar.
  • One or more conductors which serve as a common connection for multiple circuits.

Travel

  • noun a large motor vehicle for carrying passengers
  • verb to clear away dirty plates, cutlery, etc., from tables in a restaurant

Origin & History of “bus”

Bus is, of course, short for omnibus. The first person on record as using it was the British writer Harriet Martineau, who spelled it buss: ‘if the station offers me a place in the buss’, Weal and woe in Garveloch 1832. Omnibus itself was borrowed from French, where it was first applied in 1828 to a voiture omnibus, literally ‘carriage for everyone’ (omnibus is the dative plural of Latin omnis ‘all’).
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