Conventional

Formed by agreement or compact; stipulated.

Growing out of, or depending on, custom or tacit agreement; sanctioned by general concurrence or usage; formal.

Based upon tradition, whether religious and historical or of artistic rules.

Abstracted; removed from close representation of nature by the deliberate selection of what is to be represented and what is to be rejected; as, a conventional flower; a conventional shell. Cf. Conventionalize, v. t.