A definitive guide was needed for understanding how healthy men and women are different.

This became the definitive guide for determining if someone is overweight.

The magazine describes itself as "the definitive guide to free Windows software".

It has since been described as "the definitive guide to Britpop".

But for those who aspire to greatness, here is the definitive guide.

Implement an effective, integrated marketing program for your business with help from this definitive guide.

It is billed as "The definitive guide to hometown politics in the nation's capital."

No other American or, for that matter, world city can boast so definitive a one-volume guide to its built environment.

The book has, for more than 30 years, been regarded as the definitive guide to these two great mountains of East Africa.

In 1989 the group published a definitive guide to breaking security on Bank of America home banking systems.