Other forms: buses
A bus is the long road vehicle that carries many passengers for a fare. Catch the bus, the bus is late, a bus stop.
Bus stop, bus lane, bus pass and bus route are standard. Coach is the British word for a long-distance one. In computing, a bus is a channel carrying data between components. Note that bus is short for omnibus, Latin for for all — the whole point of the vehicle; and that miss the bus means to lose your chance, which is about as apt an idiom as English has.
1nounbusA long road vehicle carrying many passengers for a fare.
“I take the bus to work because I don't have a car.”
bus is a passenger vehicle.
Latin omnibus means for all, the dative plural of omnis. A Paris hatter named Omnès put Omnes Omnibus over his shop, the vehicles that stopped there took the name, and English cut off everything but the ending.
Clipping of omnibus. a clipping of omnibus. Superseded earlier 'bus, where the apostrophe indicated a clipping. The shift in spelling likely reflects the fact that modern speakers no longer perceive this term as a clipping. The electrical sense is derived from figurative application of the automotive sense.
Etymology from Wiktionary, CC BY-SA