About the best use of a dictionary site wouldn't really be the definitions, but the type of word (verb, noun, etc). With that, the bot would at least have the ability to combine things into something that could potentially be a valid sentence even if the words themselves aren't correct.
Example (not valid because it's just nouns):
car ball ocean sky
Example (could be valid if the word meanings were different):
the moon wrote ocean
Obviously, that makes no sense because we know what those words mean. However, the point I'm making is that without actual meaning of words, it could be a valid sentence. Just combining the right types of words together could form a valid sentence. Then, you can move to what words mean and what words can be put together and still make sense.
That isn't to say this is easy or possible in mIRC. I'm just showing that the definitions aren't necessarily the most important part of a dictionary lookup.
