Learning Circuits e-Learning Glossary
ASTD's e-learning Webzine, Learning Circuits, offers a comprehensive e-learning glossary with more than 275 terms. Updated monthly, the glossary is certified by a panel of e-learning experts. This is simply the best e-learning glossary available.

e-LearningGuru.com's Glossary
e-LearningGuru claims to have the "world's biggest, or at least most irreverant, e-learning glossary!". Kevin Kruse, founder of e-LearningGuru.com is more than a credible resource, so this glossary is worth using.

Glossaries of E-Learning Terminology
Check out this listing of e-learning glossaries from EdTechPost.

EduTools Course Management Systems Glossary
This glossary focuses on course management system terminology.

Synchronous & Asynchronous - Clarifying These Terms

One of the terms I have found most misunderstood and misused is "asynchronous". To help to clarify, I have provided the definition I use:

Roberta's Synch & Asynch Definitions
By Roberta Westwood, Westwood Dynamics

As well, there are a few articles out there that explain the terms synchronous and asynchronous really well. Try these:

What are "Synchronous" and "Asynchronous" Training?
By Kevin Kruse, e-LearningGuru.com

Building Communities - Strategies for Collaborative Learning
By Soren Kaplan, Learning Circuits

It's About Time: Synch & Asynch Communication
Think you've got the terms "synchronous" and "asynchronous" straight now? Try this quick online quiz by Corey Bergeron.