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.
Running or performing extremely smoothly, especially (music, slang) playing perfectly, perfectly in sync with others, or with perfect focus.
Used other than figuratively or idiomatically: see in, groove.