In Google you can use the 'define' search syntax, if you are looking for definitions on the web. Simply write the word(s) you need the definition with the special syntax keyword 'define', like shown below:
define google juice
define julienne
define 42
Google tells you that these are defined as "power of a website to turn up in Google," "cut food into thin sticks," and "being two more than forty," thanks to Wikipedia, Low Carb Luxury, and WordNet at Princeton, respectively.
Click the "Web definitions for..." link or prefix the word you're defining with 'define:' (note the addition of a colon) in the first place, and you'll net a full page of definitions drawn from all manner of places. for example, 'define:TLA' finds turns up a large number of definitions (all about the same).
Here one thing to be kept in mind that The 'define word' syntax is still subject to spelling suggestions, so you don't have to worry too much about misspelling. The 'define:word' form, however, doesn't perform a web search at all, so it returns no results or spelling suggestions whatsoever if it finds no definitions to offer you.
