Dictionaries and thesauruses are the ox and mule of the book kingdom. They may not be beautiful, and don't get all the attention, but they are a loyal, hard-working bunch that humans greatly depend on. The modern day descendants of these useful books are available online. Merriam Webster, Dictionary.com, Cambridge, Oxford, Longman and just about everyone has transformed themselves to the web.
If you think looking up word meanings or synonyms is boring, have a look at Worknik. It's got a delightful bunch of features for those of you who like spending time with words.
Another very interesting place to visit (for us Indians only please) is Samosapedia. A rib-tickling combination of fun, nostalgia, dictionary and Indianisms all rolled into one, it really doesn't get any better than this. Rest assured, words and their meanings will no longer be a 'botheration'.
The author is co-founder and Director, Content Design at Steta