In the first phase he made no attempt at a rigid, systematic definition of what he was talking about.

With this more rigid definition of similitude, the cylinder and the plane are obviously no longer the same.

Anything to get away from jazz's rigid definitions, its oppressive sense of what's appropriate, is the right thing.

Although we will clarify it in the course of this study, multimedia is hard to pin down to a rigid definition.

And so I don't think there really is a rigid, clear definition.

They are rough categories based on similar designs and do not correspond to a rigid definition.

Over time, it's very difficult to put a very rigid definition to such a thing as a format.

But I still believe that our bank of issue has a more rigid definition of price stability than other internationally important central banks.

I would therefore advocate a rigid definition of the term 'parent carrier'.

The current cases have not resulted in rigid definitions of reasonableness.