The Sloan Consortium defines the different types of courses in the following way. You can view the full article here.
Web Facilitated courses have 1% to 29% of its content delivered online. This type of course uses web-based technology to facilitate what is essentially a face-to-face course. The course uses a course management system (CMS) or web pages to post the syllabus and readings, for example. Click here to see a list of suggested list of tools for Web Facilitated courses.
Blended/Hybrid courses have 30% to 79% of its content delivered online. This type of course blends online and face-to-face delivery. A substantial proportion of the content is delivered online. The course typically uses online discussions, and typically has some face-to-face meetings. Click here to see a list of suggested tools for Blended/Hybrid courses.