01 a. Formed by agreement or compact; stipulated.
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1.
Formed by agreement or compact; stipulated.“Conventional services reserved by tenures upon grants, made out of the crown or knights' service.” — Sir M. Hale.
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2.
Growing out of, or depending on, custom or tacit agreement; sanctioned by general concurrence or usage; formal.“The conventional language appropriated to monarchs.” — Motley.“The ordinary salutations, and other points of social behavior, are conventional.” — Latham.
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3.
Based upon tradition, whether religious and historical or of artistic rules.(Fine Arts)