Proper; in keeping with etiquette or social standards.
Pertaining to a convention, as in following generally accepted principles, methods and behaviour.
Ordinary, commonplace.
In accordance with a bidding convention, as opposed to a natural bid.
Banal, trite, hackneyed, unoriginal or clichéd.
Pertaining to a weapon which is not a weapon of mass destruction.
Making use of synthetic fertilizers and pesticides.
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.