www.investopedia.com

A great dictionary site that explains over 4500 industry terms.  Easy to use (click on ‘Dictionary’, type in the term and press ‘Go’).  We like it because it provides several definitions for each term, so you always find a definition that is at your level, no matter how beginner or advanced.  (Note: this is an American site, so some Canadian terms may not be found…however there are very few Canadian-only terms anyway).