Scott Pollack writing for Forbes1 defined it as:
"Business development is the creation of long-term value for an organisation from customers, markets, and relationships"
How do we do that?
It starts with understanding (or maybe helping to discover) why you're in business, what it is you're trying to achieve, what really matters most to you. Where your business fits in the world, and how it's going to deliver what you want.
The numbers are important - but the right numbers and the right measures.