tending to follow what is done or considered acceptable by society in general; normal and ordinary, and perhaps not very interesting
She's very conventional in her views.
following what is traditional or the way sth has been done for a long time
It's not a hotel, in the conventional sense, but rather a whole village turned into a hotel.
especially of weapons
常规部队 / 武器
a conventional power station (= using oil or coal as fuel, rather than nuclear power)
conventionally grown food (= grown according to conventional methods)
the view or belief that most people hold
Conventional wisdom has it that riots only ever happen in cities.