ODP (Open Directory Project) / DMOZ : dmoz.org
A massive directory continually expanded by volunteers. What sets this directory apart is that it makes its database of indexed documents available to other directories & search engines. A listing here results in the page automatically being listed in many other directories and search engines. The model of using volunteer editors is fairly ambitious - and surprisingly successful. It is a mammoth achievement and an asset to the online world.

Off the page / Off the page factors / Off the page criteria
Those factors that impact the ranking of a web page but that are not located on the web page itself. Inbound links, anchor text etc. are examples of off the page factors.

Optimize / Optimization
A page is said to be optimized when it has been structured in such a way that it ranks well (on the SERPs) for those keywords it targets. It is a fairly subjective concept. What some see as optimization might be termed spamdexing by others. In the strictest sense, optimization means simply making a page spider-friendly by, for example, using text links rather than image links. In the SEO industry the term is more often used as a collective name for all the "tricks" webmasters use to improve a page's ranking.

Outbound Link
When site A links to site B, site A has an outbound link and site B has an inbound link.