bus

bus (bʌs)
—n , pl buses, busses
1.	More formal name: omnibus, Sometimes called: motorbus a large motor vehicle designed to carry passengers between stopping places along a regular route
2.	short for trolleybus
3.	(modifier) of or relating to a bus or buses: a bus driver; a bus station
4.	informal a car or aircraft, esp one that is old and shaky
5.	electronics, computing short for busbar
6.	the part of a MIRV missile payload containing the re-entry vehicles and guidance and thrust devices
7.	astronautics a platform in a space vehicle used for various experiments and processes
8.	miss the bus to miss an opportunity; be too late
—vb , buses, busses, buses, busing, bused, busses, bussing, bussed
9.	to travel or transport by bus
10.	chiefly (US), (Canadian) to transport (children) by bus from one area to a school in another in order to create racially integrated classes
[C19: short for omnibus]

bus

cart used to carry dishes. Related: Bused; busing. To miss the bus, in the figurative sense, is from 1915. Busman's holiday "leisure time spent doing what one does for a living" (1893) is probably a reference to London bus drivers riding the buses on their days off.

bus definition

architecture, networking
A set of electrical conductors (wires, PCB tracks or connections in an integrated circuit) connecting various "stations", which can be functional units in a computer or nodes in a network. A bus is a broadcast channel, meaning that each station receives every other station's transmissions and all stations have equal access to the bus.
Various schemes have been invented to solve the problem of collisions: multiple stations trying to transmit at once, e.g. CSMA/CD, bus master.
The term is almost certainly derived from the electrical engineering term "bus bar" - a substantial, rigid power supply conductor to which several connections are made. This was once written "'bus bar" as it was a contraction of "omnibus bar" - a connection bar "for all", by analogy with the passenger omnibus - a conveyance "for all".
More on derivation (http://foldoc.org/pub/misc/omnibus.html).
See computer bus or bus network.
(2009-07-16)

bus. business