Ordinary, commonplace.
In accordance with a bidding convention, as opposed to a natural bid.
Pertaining to a convention, as in following generally accepted principles, methods and behaviour.
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.
commonplace, ordinary
appropriate for ordinary use, rather than for special occasions
the ordinary or routine day or occasion