In a manner that accords with accepted standards, norms, or general practice; normally. The device is conventionally powered by electricity from the mains.
In a way that conforms to established social customs or etiquette, especially in dress or behaviour. He was conventionally dressed in black tie for the gala.
(Military) Using or involving only non-nuclear weapons. The missile can be conventionally or nuclearly armed; the latest test used a conventionally armed version.