Meaning of “bus” - Learner’s Dictionary

bus

noun [ C ] us uk /bʌs/ plural buses
Look, here's our bus.The passengers were quickly herded onto a bus.She was knocked down by a bus.What time does the bus leave?The bus suddenly stopped and we were thrown forward.

A1 a large vehicle that carries passengers by road, usually along a fixed route:

a school bus
I'll go home by bus.
bus verb [ T ] present participle mainly UK bussing, past tense and past participle bussed, present participle US busing, past tense and past participle bused

to take a group of people somewhere in a bus

(Definition of “bus” from the Cambridge Learner’s Dictionary © Cambridge University Press)