1 [buhs]
noun, plural buses, busses.
a large motor vehicle, having a long body, equipped with seats or benches for passengers, usually operating as part of a scheduled service; omnibus.
a similar horse-drawn vehicle.
a passenger automobile or airplane used in a manner resembling that of a bus.
any vehicle operated to transport children to school.
a low, movable filing cabinet.
Electricity. Also called bus bar, busbar [buhs-bahr] . a heavy conductor, often made of copper in the shape of a bar, used to collect, carry, and distribute powerful electric currents, as those produced by generators.
Computers. a circuit that connects the CPU with other devices in a computer.
verb (used with object), bused or bussed, busing or bussing.
to convey or transport by bus: to bus the tourists to another hotel.
to transport (pupils) to school by bus, especially as a means of achieving racial integration.
verb (used without object), bused or bussed, busing or bussing.
to travel on or by means of a bus: We bused to New York on a theater trip.
throw under the bus. throw ( def 57 ).

1825–35; short for omnibus; (def 6) short for omnibus bar

bussed, bust.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
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]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1832, abbreviation of omnibus (q.v.). The English word is simply a Latin dative plural ending. The verb meaning "transport students to integrate schools" is first recorded 1961. Verb meaning "clear tables in a restaurant" is first attested 1913, probably from the four-wheeled
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.
Online Etymology Dictionary, © 2010 Douglas Harper
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