What is the meaning of the word "conventional"?

Definitions:

(weapons) using energy for propulsion or destruction that is not nuclear energy adjective
- conventional warfare
conforming with accepted standards adjective
- a conventional view of the world
following accepted customs and proprieties adjective
- conventional wisdom
in accord with or being a tradition or practice accepted from the past adjective
- a conventional church wedding with the bride in traditional white
unimaginative and conformist adjective
- conventional bourgeois lives