The terminology in Zoho CRM is a bit foreign to me.

I am generally more familiar with:

Lead: Somebody somewhat interested

Prospect: Somebody qualified to buy

Opportunity: Somebody qualified and interested/ready to buy.

Zoho CRM seems to use Deals and Contacts, which completely baffles me...

What exactly is a "Deal" and a "Contact" in Zoho CRM supposed to be in terms of where they fit in the sales funnel?