When readers/people are roleplaying, and they come across a word. (I always underline tricky words in a RP.) Probably the person can click on the word and find the meaning, I have to go to google if I come across a word I don't know.
If you want to go out of your way to help your readers, you can link directly to the definition straight from the word like this: [url=http://dictionary.com/browse/magniloquent]magniloquent[/url] which produces this: magniloquent
Alternately, if you're using Chrome or Firefox (don't know about other browsers), you can highlight the word, right click it, and choose "Search Google for 'highlighted word'". Hope that helps!