From WordNet (r) 3.0 (2006):
bus
n 1: a vehicle carrying many passengers; used for public
transport; "he always rode the bus to work" [syn: bus,
autobus, coach, charabanc, double-decker, jitney,
motorbus, motorcoach, omnibus, passenger vehicle]
2: the topology of a network whose components are connected by a
busbar [syn: bus topology, bus]
3: an electrical conductor that makes a common connection
between several circuits; "the busbar in this computer can
transmit data either way between any two components of the
system" [syn: busbar, bus]
4: a car that is old and unreliable; "the fenders had fallen off
that old bus" [syn: bus, jalopy, heap]
v 1: send or move around by bus; "The children were bussed to
school"
2: ride in a bus
3: remove used dishes from the table in restaurants