Is Using a Portal the Same as Teleporting

This question stems from the game portal and some scifi concepts of Teleporting. The question stemmed from an office conversation following everyone seeing the internet meme of a guy licking his "elbow" from one portal to another. The question was is the act considered teleportation. More specifically, does someone need to be completely moved somewhere to be considered teleportation, or is partial considered teleportation. If partial isn't teleportation then what is the term for the "continuous teleportation" or "worm-holing"?

Examples:

1. In Star Trek you disappear from one spot and show up in another. Happens all together at one point in time.


2. Video games, Halo/TF2/etc, where you teleport and telefrag other players. Happens all together at one point in time.


3. The game portal, you can reach through the portal or shoot through it, so is this "worm holing," teleporting or something else?