This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Based on or in accordance with general agreement, use, or practice; customary: conventional symbols; a conventional form of address.

adj. Conforming to established practice or accepted standards; traditional: a conventional church wedding.

adj. Devoted to or bound by conventions to the point of artificiality; ceremonious.

adj. Unimaginative; conformist: longed to escape from their conventional, bourgeois lives.

adj. Represented, as in a work of art, in simplified or abstract form.

adj. Law Based on consent or agreement; contractual.

adj. Of, relating to, or resembling an assembly.

adj. Using means other than nuclear weapons or energy: conventional warfare; conventional power plants.

adj. Pertaining to a convention, as in following generally accepted principles, methods and behaviour.

adj. ordinary, commonplace

adj. banal, trite, hackneyed, unoriginal or cliche

n. A conventional gilt-edged security, a kind of bond paying the holder a fixed cash payment (or coupon) every six months until maturity, at which point the holder receives the final payment and the return of the principal.

adj. Formed by agreement or compact; stipulated.

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

adj.

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

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

Relating or pertaining to a convention, or formal meeting of delegates.

Stipulated; covenanted; established by agreement.

Arbitrarily selected, fixed, or determined: as, a conventional sign.

Arising out of custom or usage; sanctioned by general concurrence; depending on usage or tacit agreement; not existing from any natural growth or necessity; generally accepted or observed; formal.

Specifically In the fine arts, depending on accepted models or traditions, irrespective of independent study of nature; traditionally or purposely deviating from natural forms, although properly retaining the principles which underlie them: as, the conventional forms of birds, beasts, flowers, etc., in heraldry and on coins.

In law, resting in actual contract: as, the conventional relation of landlord and tenant, as distinguished from the implied obligation to pay for use and occupation, incurred by occupying another's land without agreement.

In card-playing, noting any method of conveying information which is not based on the principles of the game, such as the trump signal, the American leads, etc.

adj. in accord with or being a tradition or practice accepted from the past

adj. (weapons) using energy for propulsion or destruction that is not nuclear energy

adj. conforming with accepted standards

adj. rigidly formal or bound by convention

adj. represented in simplified or symbolic form

adj. unimaginative and conformist

adj. following accepted customs and proprieties

"In this report the term conventional energy is used to refer to fossil fuel, nuclear energy, and large-scale hydropower."

traditional    orthodox    formal    nonrepresentational    white-bread    conservative    stereotypic    button-down    unimaginative    square   

unconventional    homelike    atypical    out of the ordinary   

formal    conventional estates    conventional obligations    conventional heir   

convention   

conventional wisdom    conventionalism    conventional mortgage loan    conventional warfare    conventional war    conventionalist    conventional weapon    conventional weaponry    conventionally   

stipulated    formal    customary    agreed    accepted    cut and dried    artificial    right    orthodox    correct   

dimensional    intentional    unconventional    unintentional   

traditional    modern    mechanical